> I prefer to determine when I take my breaks. That's what PTO is for.
That's fine, I'm sure they have vacation time too, but it can get into being a coördination problem: if you want to spend time with friends and family during your time off, it may be hard to arrange the same days off. One benefit of holidays† is that everyone gets the same ones, and so large(r) gathers can happen.
† From the Old English for "holy day", where "holy" (originally) means 'set aside' or 'apart from'.
I switched from staff to faculty which technically gives me more hours off. the difference is that staff have set holidays but faculty get more days off. the problem is that I no longer have an excuse to take the days off. so i take off fewer.
PTO is just not getting paid all the time so you can get paid for not working some of the time. You’d be better off banking the money instead of one’s employer, just like tax withholding.