Can I ask if you avoid soda, beer, cheese, every vegetable oil, artificial sweeteners, cookies, pastries, cake, pasta, and so on? Many plant based meats come from protein extracted from peas, wheat, soy, plus some oil, binders (that generally are also used in non-plant-based foods), and seasonings.
Do you avoid soy- and wheat-fed meat? Doesn't that affect the nutrition of the meat, since the animal had not evolved to survive on this diet?
In all cases, there are nutrients and proteins that you cannot find in plant based alternatives. If you are vegetarian or stronger, you have to supplement with pills to get the things that are not in your diet. It is unclear whether lab-grown will lack nutrients found in natural meat, or if artificial supplementation is really equivalent.
Hence the desire to stay close to our evolutionary roots. Same idea as walking a lot and squatting to duce.