Career change after kids - is it realistic or am I crazy?

Currently in software engineering (good money, flexible employer, burnout is real). Been thinking about transitioning to something lower-stress like teaching or government work. Would be pay cut of like 40%, but would probably have actual boundaries.

Kids are 6, 4, and 1. Wife works too but wants me to stay in tech for "financial stability." Am I being selfish thinking about what I want versus what secures the family? Or is staying sane a form of financial stability too? Legit asking for perspective here.