We are all different, I'm not particularly competitive although I do like to win the occasional sprint at the end of the club ride
so it's likely I don't get your perspective, but that's fine, I like differences in people and opinions.
Lots of different types of clubs out there all with different focus. The club I'm in don't TT, don't race etc.. they aren't that serious, now there are some individuals that race and the fast boys average 23 on open roads on a Thursday night trash. I can't stay with them, 20 is enough for me. There is a little formality but mostly it is just a social group ride, learning skills and having fun. We don't drop people unlike some clubs.
I've done rides with the racers and they are a breed apart, I was on the front with one, I was in bits, max HR, he wasn't even trying, I know this as I couldn't talk, but he was giving me great advice of pacing at the time.
I love club riding, but get that many don't.