Totally agree. Each body has different requirements. We can't see what is going on inside, which is why individual experimentation (n=1) is so useful.

There are on plan foods that I crave. While I can eat them in moderation and not gain, those foods keep me from losing. Dairy and nuts. Oh how I miss dairy!

I can't lose either with dairy. I have to severely limit it or avoid it all together.
I know a lot of people do well on strict keto. I can't seem to get out of the 'keto flu' after months on it. I increase my water, salt, potassium, drink broth, do all the recommended fixes and I still feel lousy.