Do people trim their kitties nails? I saw vets talking about it online so it seems like standard practice but my bf made it seem like an inhumane act?

I think I am good to leave their nails as they are.. they are not aggressive kitties...

I mean there are occasions when they scratch me lol , but i think mostly by accident .. like yesterday, I was working and one kitty wanted to sit on my lap or reach me on my work chair, which is a bit high, and so he jumped, and stuck his claws to my lap to climb up, ouch! I wear PJ shorts ALL the time even in winters..!! I may start wearing full length, not joking!

Thankfully, it wasn't much because I quickly retracted, but yea, kitty doesn't recognize I don't have furr like him and just wanted to get to where I was sitting and I think I was not paying attention to him as I was focused on work, so he did what he had to do! Lol

Or if they go into their rough play with each other while on my lap, I am like, no no, let me cover my legs first lol.

But all of this is not intentional aggressive behavior.. the other day though, when kitty was in that crazy interactive play mode/interval.. I was playing with him and teasing him, touching his neck and chest, and he sort of scratched me and bite me, but it was also done lightly and did not hurt mych, even though he was in a very energetic play mode. I think he was just in that hunting mode and playing with me rather than getting aggressive.. Usually they don't mind me touching their neck, chest and tummy, and one of them actually loves it and whenever I pet their neck, it is like I gave them some sort of instant sleeping pills lol but I guess in that mode it meant something!

So i don't feel a need to trim their nails, and I know they use it to climb as they stick them onto objects when they jump, and not just for scratching, and I definitely don't want to deprive them that or even lower their ability to climb well etc (I wonder if it would lower their ability to climb if nails are shorter or less sharp?) and if it would, it is one big reason i would not do it, because i want them to remain as active as possible, as it is only healthy for them..

But regardless, I was wondering what people thought about that? Because online it seems something very normal and done regularly but I guess there are mixed opinions? And I really never had cats before or pets for that matter.