It could be a great job, if teaching was all you had to do. I adored the actual teaching part of the job.
If all you had to do was the teaching and book marking, a primary teacher could easily work 9-5 (or more like 8.30-4.30) and most would be perfectly happy with that. Six hours of teaching, a few hours paperwork. Lovely.
But then when do you do the long and short term planning, the differentiated resource creating, the data entry and analysis, the parents evening, making phone calls home about behaviour, meeting with the SENCO and parents for SEN plans, planning the school trips and writing risk assessments, running an after school club, the staff meetings, the training sessions and cross-borough meetings, subject leadership tasks, organising seating plans and ability groupings, marking the homework?
And those are just the things I recall off the top of my head, I'm sure there are more. And they don't include the mundane day to day things like keeping kids back to discuss behaviour, break duties, sorting out squabbles the dinner staff report, parents wanting "a quick chat" at home time etc.