Prep time is the biggest concern I am aware of on the nutritional side. My best answer to this category of excuses is to amortize the prep time by making more of whatever and then freezing the leftovers in meal-sized containers.

Buying an instant pot & a box of those 2-cup pyrex storage bowls was the best series of personal health choices I've ever made. Granted, not all food works out with a round trip through the freezer, but most things do.

I still do eat things that cannot be frozen (well), such as eggs+bacon+toast, but the core of my nutritional needs are available in my freezer at all times (with approximately 1-2 weeks of buffer). Having a small buffer keeps me absolutely calm regarding my next meal source. I do not wait until all my frozen food is gone before I prepare the next batch. If I didn't have the buffer, my cycle would probably break and I'd start eating Burger King and other related trash for lunch again.