@Seedfork, those piles look great. If you have room to do it that way, why not? I have in other circumstances done similar piles and it works just fine.
Heck, when I very first started trying to learn to compost, I called Mom and Dad, because I knew they had done something but as a teenager (during the time they had a wonderful garden) I was too stuck up to pay attention.
They said "Oh, you can do all that fancy layering if you want to, but all we ever did was dig it into the ground."
They would just collect kitchen scraps and carry them out to the yard at the end of the day and dig them in, somewhere or other, wherever they thought needed some organic matter,
But, it worked just fine.
I later learned they were doing a version of what's called "sheet composting". I guess. Or maybe a version of "trench composting."
Takes all kinds!