You may have a mental image of a mother or grandmother standing in front of an oven for 2 hours tending to some cooking pies or cutting up potatoes; and maybe there are a dozen messy ingredients scattered about the countertops.
I'm not exaggerating when I say I throw some calories into a container, hit a button to apply heat, and come back in N minutes when it's done. I also use paper plates, napkins, and plastic forks to avoid having to do dishes(however, do wipe the container you use to cook).