In no circumstances would I even consider going back to teaching. For one thing, I am now 74. At my age, I might still be able to teach senior school competently and well, but I assuredly could not bend over junior school desks, for even five minutes.
The fact that young teachers give up, and try to find other jobs, is in many ways due to their training not being adequate.
No one discusses keeping discipline, or how to deal with difficult parents, (or unhelpful colleagues) few training colleges address the inclusive practice that populates a classroom with a certain number of children with special needs alongside healthy, bright children. Such a mixture is challenging for a teacher, as is the class that is unruly.
It is one thing to have learned school subjects and how to teach them well, during your own professional training, but if we want to keep young teachers in the profession, which we do, we need to ensure that they have more experience in actual classrooms as part of their training, with an experienced teacher to help solve the problems that will and do confront the new, young teacher.