Anybody who thinks that non-ADHD people go straight from start to end has never listened to another human tell a story.
Sure, there are times when someone has a well-rehearsed story that they've told 1000 times so they're basically doing a monologue they've memorized. But, mostly people forget details and have to go back, or stop to clarify something, and so on. Losing their train of thought is also perfectly normal.
I'm sure that people with ADHD are more scatterbrained. But, you should have a realistic comparison for what's "normal".
I tend to exhibit ADHD-type speech patterns when I'm overwhelmed by a new task that I'm trying to explain, inadvertently letting random facts and emotions creep haphazardly into the dialogue.
I hear myself do it and think "huh, this must be what ADHD people feel like all the time"
There needs to be another box in there that is not connected to any of the other boxes. Just because. Like it was going to be part of the story but lol no.
I'm still a little rocked by my fellow AuDHD friend that I yap too much (exactly like this meme - my yap is the stuff outside of the story) and that's why she stopped calling with me.
I became a lot more conscious of when I start to yap and started trying to get things back on track but it's been an uphill battle.
Then like 6 months later she clarified she pretty much doesn't call with anyone else anymore and not just me, but in person she's totally cool with me yapping..
Like woman, yes I have started improving myself in that aspect but ouch
"tetris, can you come over? it will just take 10 minutes because I cant shift because of my back, and you were the one that put the bed there if you remember, and your aunt is coming on the third..."
vs.
"tetris, can you move the bed if you've got 10 minutes? My back hurts and your aunt will be visiting."
this is totally how i would write stories if I ever came to writing
Then read AntKind by Charlie Kaufmann. Or watch his movies.