Spoken like someone that hasn't been working very long, or if at all.
While school can be very pressure intense around exams in ways many jobs aren't you at least have summer and other breaks. For work you get vacation time sure, but it's nowhere near in terms of time.
Further adult life has a whole slew of responsibilities on top that you need to handle. Most 30+ can't subside on the crap we ate during college, we can't fuck off from our responsibilities when we can't be arsed with minimal consequences and we sure as shit won't find social stimulus without putting in effort, neither friends nor romantic. Sure if you live where you've always lived then you hopefully have childhood/school friends left at 30 but if you've moved then it's not a given at all.
Work is pretty much the same, but depending on your job it can be way worse, or actually not that bad. I've had both.
Started off in a repetitive job with highly demanding monthly targets that we'd need to hit to get our full bonus (which was a significant part of total comp, salary was low as hell). It was an endless cycle of "X more days until Friday".
I transitioned into software engineering. Ya know what? Occasionally I was EXCITED for the next work week. It's still work and it's hella stressful and sometimes you wish you could take the next 5 years off and have no obligations. But a lot of the time, you're not actively waiting for the weekend anymore. Helps that my commute before I transitioned fully to home office was a 12 minute walk and I had after-work activities on weekdays to be excited for.
Look on the brightside. You still have the weekend when you are in school. Wait until you get a family and every single fucking weekend is taken up events you don't want to go to but you get nagged into.