Dcinmd
Double Eagle Member
I don't think anyone at the top of the fast food business sees these as the answer to the problem you're describing. I'd be willing to bet that within the next decade one of these chains will begin the shift toward lab-grown meat, as opposed to plant-based meat-substitute. These are more in response to a niche in the market turning into a broader movement that they can make money off of (vegetarianism/veganism).
What about lab grown vegetables?
https://www.onepointone.com/
https://www.aerofarms.com/how-we-grow/