But sometimes, that advice actually equates to "don't drive the minivan in your garage. Go out and buy a bicycle."

By the way, do you have any suggestions for tutorials that teach someone a mental model for how CSS/HTML layout works? In particular, I'm looking for a mental model that I can apply consistently and which doesn't feel like I'm playing whack-a-mole. So far I've found that with flexbox, but I'm still finding myself in situations where I need to work with existing block/inline/inline-block code.