Disclaimer: This is pure, third-hand speculation. I am not in a position to know if developing an animal products intolerance is possible.
I'd give the McDonalds burger a go though - it's always interesting to see how far food tech can be pushed and how different it is from the real-deal. The key in my mind is synthetic collagen to give fake meat the bounce/snap/chew of real meat (FWIW I don't eat fake meat often, just interested in food tech in general).
The best way for companies to alleviate that concern is to make your Vegan products clearly different from the meat ones.
McDonalds offers "Veggie Dippers" in the UK, and as they have a vegetable texture, they are easy to tell apart from other products:
https://www.mcdonalds.com/gb/en-gb/product/veggie-dippers-4-...
I think that this particular product is aimed at Vegans/Vegetarians, while products like the Beyond Burger and Impossible Burger are aimed at "flexitarians".
So, when making a "meaty" product, the simplest thing to do is make it a different shape than your other products.