Oh no, I know. If i'd been able to go part-time at my school ( they wouldn't let me), i'd have coped. But after having two kids 14 months apart, it wasn't feasible for me to enter a new school, with a different SOW, and the prospect of planning all those lessons from scratch again with two young kids about.
I know many primary teachers who have gone part-time or job-share after kids and it's worked out brilliantly. Less in Secondary, as timetabling often means that unless you are Maths, English or Science, they don't like employing part-time. Why should they, when they can get an NQT to do full time for your price half time?
In Secondary, I had two AS/A2 Classes, and 1 GCSE, each with 30 kids in it, ( even A Level!) and with the best will in the world, it simply isn't possible to mark 120 essays every week unless you bring a lot of work home. Most of my A Level essays were a good 5-8 pages long and took a good 15/ 20 mins to mark, each. Even though I used peer marking and times essays etc to reduce load, it still weighed me down every weekend.
In some areas, your class sizes might not be as rampacked at GCSE/ A Level. I was East London, so mine were ramjammed. Now I am rural, maybe not so much. Although now everyone stays on, maybe not!
Out of my cohort of PGCE students, only the men have stayed the course full-time, which surely tells the profession something. Some of us have returned as TAs, HLTAs, or PPA teachers, even cover supervisors. For me, a flexible return to the workplace was key, and it wasn't forthcoming, as in so many cases. The rule "you must consider part-time working requests" is farcical. All too often the answer is "no".