Spending 2 hours max to pre-prepare your meals to be warmed up later is a simple strategy to win back some time to spend on other important things to you and your family.
Imagine spending 2 hours on a Sunday bulk cooking food which can supply the whole week (Mon to Sat) - lunch and dinner done!
If you spend 2 hours preparing dinner every night that's potentially 8-12 hours of time you can save and spend on other things like playing with your kids, spending time with family or catching up with friends. Sounds good to me!