Sorry to burst your bubble, but when you finish full time education and start work, you’ll quickly realise how easy you had it now. Full time work is much more demanding!
Agree, that full time work is more demanding than life as a student, not least, because, as a student, (and cherish, savour, revel in, these years,
@rm5), one will be studying subjects that one has actually chosen, (rather than been compelled to study, as is the case at school, rather than university), and have an interest in, and thus, (hopefully) one will be motivated - interested enough - to want to study and learn them.
I must confess that I loved my time as a student, as a post grad, and as a university teacher.
Teaching is different: I only ever taught at third level, - and I took they view that they were paying me to talk about stuff that I was fascinated by and enthusiastic about - but, for each hour of class, (both tutorials, and, above all, lectures) there was preparation, sometimes requiring several hours of prep (research,etc) for each hour of contact teaching - and it changed with the course, and year - classes for final year students required a lot more work than was the case for first year students, etc; then, there was grading essays, term papers, and exams - that took weeks - and finally, there were one to one sessions with each student when returning graded papers to discuss their work.
And that is just the academics: Sometimes, students would seek you out as they needed someone - a sympathetic but respected adult - to take them for coffee, to chat to them, to advise them, counsel them, to listen to them, to mentor them, to encourage them - I was good at this, and remembered how it had felt, what it felt like, when my professors took the time to mentor me and how much it had meant to me that adults I admired, respected, even revered, in some cases, were treating me as an adult, an intellectual equal - but, at times, (and I was a university teacher of history and politics, not a trained counsellor), it was emotionally exhausting.
All of that meant that - the time, and energy - for your own research was confined to the summer months; while I taught my own specialist courses, I also did some journeyman teaching to first and second years (for example, some of the Russian history section on the Modern European History course), but this meant that the actual terms - while short enough - were completely taken up with teaching, class prep, and setting, grading, marking (and returning) student work.
Re school, (rather than university), for a teacher, just because the clock reads three, this doesn't mean that school will finish at three (or, four o'clock, for second level); there are extra-curricular activities (for example, sports, debating, school plays, etc) that teachers are expected to supervise (and encourage) in the hours after school, and, then, there is grading homework - which will take hours and hours out of an evening and week, (and worse, week-end), especially if you teach different syllabi to different years.
You couldn't pay me to teach second level; the combination of puberty, and kids compelled to study stuff that doesn't interest them (let alone enthuse them) is a nightmare from an educator's perspective.
At the very least, at university, you could assume that the hormones had settled (somewhat), while the the students had chosen - actually selected - the subjects they studied, and therefore, it was not unreasonable to suppose that they had an actual interest in this material.