I’ve thought about this for a while, too, and I tend to agree with you,
@ELT.
One aspect is this: A few years ago I was on a hard-core keto diet. For years. And it was kind of an obsession. And it worked beautifully - for a while. Lots of energy, no brain fog, some weight loss etc. Then things started to change and the benefits dissipated. So I doubled down and increased my efforts - and my symptoms got worse. So I changed course and mixed in some carbs, and felt better instantly.
About 12 months ago, the same happened again, this time on a carnivore diet. For a long time, it worked well, then the benefits, again, melted away. And again, I dug my heels in, just for the symptoms to get worse (I felt tired, and most of all I was cold all day). Again, addition of carbs solved that pretty damn quick.
So, what’s the lessons from this?
1. What works at some point in time may not (or will not) work forever. The body changes, the environment changes, and so the needs of our bodies change, too. All we can do is adapt. Part of me doesn’t like the idea at all - I want to fix things, and once and for all! Nature doesn’t seem to work that way. It’s in constant flux, and we need to adapt to those changes. The difficulty is that we often don’t really know in which direction to go - more carbs, less carbs, more of that, less of that etc. So all we can do is to try to make an educated guess, apply that and then see what happens. And adapt.
2. My obsession with food had an unhealthy dimension to it. Sure, I want my body to be as healthy as possible, but - as
@ELT wrote above - at what price? What I have been doing is figuratively hacking my way through the jungle with a machete, sweating, cursing, swatting off flies and critter etc. Instead of dancing away through it, winding around the limbs and vines, laughing and feeling the joy of it.
So, what am I doing now. I still live a healthy lifestyle - mostly. Sometimes, when invited, the food is not what I would normally eat. I don’t make a fuss anymore. I just eat what comes on the table. And I enjoy the company.
But overall - to sum up my ramblings - I try to live an “optimal lifestyle” without being too heavily emotionally invested in it. And then, sometimes I fail, for various reasons.
But live goes on, nevertheless.