Potentially unpopular opinion - the term "autism" and "ASD" have expanded way beyond their original clinical meaning. It doesn't help that even the official definition is so broad as to be useless. Add to that the cooption by the Tiktok culture to describe any "quirky" behavior, and you get the current situation where it's hard to find a person that doesn't exhibit at least some "autistic" traits
The term "neurodiverse" (or as a friend calls it "neurospicy") came about because of this. It turns out that ASD blurs into a lot of other "conditions". They also tend to blur into each other.
Rather than deal with explaining the details of how your weird, neurodiverse is used to indicate your weird, but not broken. E.g. high functioning autism isn't naturally a disorder. Instead it makes you better at some things, but worse at others. Unfortunately, one of those happens to be social skills.
Neurodiverse people tend to have a lot more in common than average. It's both from social conditioning, and commonality of interests. We also often find "normal" to be uninteresting, if not boring. We seem to naturally gather and seek out like minded people. It also runs in families. This makes it seem that it's disproportionately common. We're not actually that common, we just tend to just concentrate into a few areas.
ASD etc have there uses, but as clinical terms, for problem management. It's annoying when it's overused in media, as a catch all term.
I mean we ARE a lot more common than uneducated people think. They have the "autism = unable to speak or walk normally" mentality instead of that one kid who likes to draw and listen to music.
We are more common than many thing. However, we also tend to self select our groupings. We are a lot less common than WE feel we are.
Basically, about 50% of my local makerspace are ND. That is way higher than the general populous. However, even within family, work, or random friend groups, I still see an abnormally high percentage. I basically self select for weird people and have done all my life. This seems to be common for many of us.
People often accuse me of being Autistic and it infuriates me to no end. I don't care if I am or not I don't give a shit about knowing. I'm perfectly fine without the label and I'll keep being fine.
I hate that so often we are encouraged to label ourselves in society and that just as often people seek these labels to fit in, gain community or otherwise make themselves more interesting by incorporating some quirky or less than common fact about themselves as a whole personality trait.
I am finding more and more that neruodivergent labels are becoming the new version of houses in basic bitch Astrology.
It's not wanting a label, it's struggling to fit in and being tired of it. Finding people like yourself is how you fit in, and if you fit with some people and they have a label, you checkup on it yourself and find an explanation of why you didn't fit in in the first place.
If you feel you fit in without knowing who you might fit in with, that is great, and you don't need to have a label. But some people find it easier to find like minded people if they match labeles.
It's not so much the choice of hobby, but the degree of obsession, being so intense that even the participant admits that it's illogical, yet partakes for the emotional fulfillment.
I think this kinda thing is more in response to people who believe that autism/ADHD/neurodivergence in general is some new thing that never existed in the past. There's a lot of historical behavior that could be explained.
The insinuation here is the obsessive behavior. The text calls it a madness so I'm guessing it was a sudden occurrence.
I'm not an expert on Autism or other mental situations like ADHD mind you but it seems pretty likely Thrasyllus became hyper fixated on boats one day and he basically became a harbor manager for it much like you see other hobbyists become conductors or train line engineers for toy trains and that before the very modern diagnosis of Autism came about these people were considered strange until the behavior could in some part be explained by neurodivergent behaviors/tendencies.
People on the autism spectrum can get really absorbed by their special interests. It seems that this Greek man suffered a brief delusion (being owner of all those ships). Delusions are not part of autism, but the way he categorized the ships and took care of the entries is reminiscent of autistic exhaustive or meticulous behavior.
About the hobbies, not every hobby is a sign of ASD, but there are hobbies that have a bigger proportion of autistic individuals compared to others. Collecting trains has become a meme and a stereotype, but there are others. If you see someone with a train collection, they are not necessarily autistic, of course. But if they have a train collection, records of every change within the collection, books about the hobby, etc., you'd have the right to be suspicious.
Disclaimer: I speak from my experience with loved ones with ASD. I hope I'm not misrepresenting anything.