What about non-team sports, like running, cycling, surfing, skiing, etc. maybe there’s a defensive strategy but there’s no active defensive player. Are those also not sports?
Part of the definition of a sport is that it accomplishes absolutely nothing useful at all, other than entertainment, thought about it and perhaps fitness. Bathing a cat is not a sport because it actually has a useful goal, I.e. cleaning a cat.
I would say that getting healthier and fitter is absolutely useful, and so is entertainment.
But anyways, some sports can be useful for training purposes (Ever heard of the Firefighter Olympics? It's really cool).
Also there's also stuff like people jogging/biking to go places, and sailing maybe can also fall into this category though I don't think it's a thing anymore. (IIRC in the 1700s there was a sort of sport where ships would race each other across the Atlantic to deliver stuff as fast as possible. Not sure though, take with grain of salt.)
There's still people who sail to get to a destination. It's a bit of a rich person thing, though. Even without a motor, boats are holes in the water that you sink money into. More so if it has to be ocean-going.
Where do you draw the line between sports and games? Are sports competitive where games are fun? Is poker a sport? Are video games capable of being sports? What could be done to golf that would make it a sport? Are all sports games if not all games are sports?
But that's a team sport though. If we compare that to tennis the oldest tournament winner is Rosewall in the 70s at 37 years old and more recently Federer in 2018 at 36 years old.
Sports that are more based on endurance than sprinting tend to have older people who do well. Mid-40s is pushing it for championship level, but you can still be competitive at that stage, and still participate well into old age if you don't have any major health/injury issues.
I actually get exhausted playing golf - but that's because I'm BAD at it. Apparently I put too much force into my swing. Every time I've tried to play I get told to relax and "let the club to the work".
So they literally have these weighted sticks to reduce the amount of frickin effort required to hit the ball.
It's not a sport. It's an ANTI-sport. The less you try the better you'll be.
Can you imagine if we had an Olympic running sport to see who the slowest runner was? That's what golf is. Get the weakest, limpest, vitamin-defficient humans and see how accurately they can hit a tiny ball into a hole.
It was invented by the Scots as a joke against the English while they all go and compete in proper sports like caber tossing and hammer throwing.
Or to keep it short, know that John Daly is one of the greats of the sport. Look up a picture of John Daly dated any time in the last 30 years, and you'll know how hilarious that is.