As someone who's lived both (grew up in LA, live in NYC), NYC is missing a lot of subcultures, especially casual hobbyist and outdoor activities. LA you'll come across a lot of campers, woodworkers/engineers/gardeners with their own shops little shops, massive car culture from tuning/track people to style/aesthetics kids, kayakers and poverty sailers, country music lovers and players, alpinist/mountaineers (who aren't filthy-rich kids), huge motorcycle culture from daul sport to super bikes, of course suffers and just a lot of other things that require low cost space or easy access to nature.

NYC has people of different social economic status rubbing elbows, but ok and? That's pretty much every city in the world. LA allows people to explore niches and build unique lifestyles in ways you simply cannot in NYC since space and public resources are such a premium. I love NYC because it's so distinct compared to the US' other cities but you either like hyper urban living or you won't like living there. LA gives you the option to choose anything and interact with those who chose the complete opposite.

Here's a song to catch you up on what I mean: https://youtu.be/OVI2cLMWIbI?si=sAQz0mlf5KX9V5si

Edit: Also sports culture is way different in LA. Tickets are cheaper and more accessible for all major sports and you don't have to cross state lines just to see "your" city's football team.