It’s a cultural thing and a learned one. I will say that because I was one!
I was one who would show up late to things and not offer explanations. I would certainly apologize for it but it was a routine occurrence. I got it from my mom.
After I married my wife she set me straight about the whole thing. I was late on her a few times and it bothered her a lot. Nowadays I am early for things, for the most part and it does feel a lot better.
It’s a lesson that people learn and if it bothers them enough that something that is late ends on time they will get the hint that starting on time will give them the full time to use. Sadly though many people don’t get that and don’t care enough to change.
Yeah, I’d agree it’s definitely a cultural or learned thing. In the end, a lot of people just don’t care enough to change. That’s where we have the choice, deciding whether we want to stick around people who don’t respect our time. Some people are fine with others being late, and some aren’t.
In the workplace, though, I just have to deal with it. If someone’s not happy getting there full time, they either need to fix it or keep being unhappy, it’s up to them.