Working a 10 hour day, add an hour for commute and dropping the kiddo off/picking up from daycare, add in anything else that needs to be taken care of immediately like a surprise run to the store because the kiddo came back with a fever and snotty nose and you're not sure if there's enough kids cold medicine to last the next few days, the kiddo won't eat rice and beans (jesus I have a hard time getting that down as a "meal" no matter how you dress it up, it gets old after a while)

... Some chicken nuggets and fruit don't seem so bad because the kid will eat. I'll eat something else but I'd rather the kid eat instead of refusing what's offered. No amount of telling a 3 year old that it's healthy, won't kill you, and you have to eat it will get them to suffer though something they don't want

I'd do crock pot recipes so they'd be ready when we got home but no guarantee the kiddo will like it. Leftovers got frozen and I'd eat them at school/work. But you can't put rice in at the same time as beans because the rice turns to mush...

This isn't directed at you, but yeah after a really long day it's a bit too much effort