@Lothric
If you're not so sensitive to the presence of anti-nutrients and toxins in grains which are made into starch for food, you can take starch with no problem at all.
Ray Peat is sensitive somehow to them and cautions against eating starch, so he is disposed to be biased against starch. And so there is a prevailing negative take against starch among his followers.
But Ray also says that if you have a high metabolism, which provides you with high energy, you are much less likely to be sensitive to such potential irritants and allergens.
I personally have no allergies at all, as the last one I had for a long long time- allergic rhinitis- went away when my metabolism greatly improved as a result of a long period (4-5 years) of going cold turkey on PUFAs.
A lot of people have gut issues, and this makes them have a valid point against starch. So, if you are so affected, by all means avoid starch. But if you're not, there is no sense following the anti-starch bandwagon.
But if you are, maybe a way out of it is not to view it as a genetic susceptibility as much as a metabolic issue, and find a way to improve your metabolism. As improving your metabolism is like a tide that lifts all ships. It is worth your while to to spend more time on improving your metabolism than to work on each and every sundry issue in your body with a variety of nutraceuticals, supplements, and drugs that is like losing the forest for the trees.
Yet a majority, even in this forum, like to take a microscope to every little issue, and end up with unresolved issues.