That's utter rubbish and you (should) know it.
It isn't possible. When do you - or your university - imagine lessons get planned and work gets marked? Did you do ANY research into what teaching involved before you signed up for it. Do you have any idea WHY there is a recruitment and retention crisis in teaching and why the unions and staff believe the workload is unsustainable and a major issue?
I frankly now do not believe you are a teacher. No one who has spent any time whatsoever in a school could possibly believe that teachers do not work evenings or weekends. If you do, then you are in for a very rude awakening indeed.
I can tell you, that last year I taught 210 students Y8 - Y11. I had 4 GCSE classes which were full, so 120 GCSE students. I also taught 52 A level students. I teach History.
How long do you imagine 52 A level essays take to mark? I was setting a minimum of one a fortnight. If we ignore A level, then I had 210 books to mark, never mind the GCSE questions/essays. 5 minutes a week marking each pupils book is 1050 minutes - or 17.5 hours marking. Therefore, if I want to spend a mere 5 minutes every week marking each student's work I've got a minimum of almost 18 hours marking a week - or 3 hours a night for 6 days of the week. Even if you teach Maths, or something much less essay based, you still need to mark books and give feedback.
HOW does your university imagine this can be done without working evenings or weekends? Or do you not realise that books get marked in your free time?