I think regardless of the primary reason (environmental, health, Karma, …) to choose a non-traditional meat substitute, there are two additional factors playing in: taste/taste expectation & cost.
Not everyone that signs up for the primary reason does feel that the other two factors can be satisfied. If you will, right now these three factors form a triangle in which you necessarily will have to compromise. There is a small part of the population that is able to compromise on price, and thus will get a product that is as close as currently possible to meat (and black bean quinoa patties do not fulfill anyones taste expectation as a meat substitute). They are also compromising on their primary reason, as you have rightfully pointed out, be it environmental or health-related, although not consciously but due to lacking proper analyses of the matter.
This is and - by market consensus - will be the target group for meat replacements, unless the third factor, price, will significantly drop - the McDonalds factor (you eat because of availability & affordability). Once and only if that would happen, companies like Beyond Meat would truly step out of a limited, yet currently moderately lucrative niche segment of the food industry. The market does not foresee this to be happening anytime soon, so the honeymoon phase on the stock market for these producers of plant-based products is unfortunately over …
