I mean there is a financial incentive to use byproducts of industrial processes that would otherwise be wasted, as food ingredients, and as there is no requirement to rigorously show that new ingredients are safe to consume in the US, this happens all the time and makes up a big portion of the average modern US diet.

But the list of allegedly questionable foods above are all foods we already eat, just with some things removed (e.g., avocado oil is just avocado with the flesh removed; pea protein is peas with the carbs removed). It is not obvious to me how you would conclude these are unhealthy.