Is this a strange thing to do - cutting out acquaintances only but keeping true friends

[5t6y7u]

I've got to know people over the years through a hobby or work, but I wouldn't describe them as friends and am losing interest in going to events where I don't feel like they're really friends or people who I click with or enjoy spending time with. I've realised I only go to a lot of events with these people because I should, and really I'd rather cut back and just spend time with people I really want to. I no longer have the fear of missing out?

Is this a strange thing to do, I'm wondering?

Only go when you feel like it. It’s ok

Situational 'friends' is a thing - those mums you knew when your kids were in the same class or sport, but you never see them outside of the socialising associated. Or workmates you chatted to and maybe went to the pub with as a group but would never see for a one to one meal.
For five years my son played rugby, twice a week every week from October for months I saw these people, got to know them quite well, travelling to matches, working together volunteering to cook the bacon butties....when it was over (when our kids turned 16) I never saw any of them ever again. So just don't, they will miss you about as much as you miss them.