Basically everything we need in terms of nutrients (micro and macro) can be found in non-meat food products. Wherever a non-meat diet falls short of the needed micronutrients, multivitamins can be added to make up any deficiencies. Again, see vegans.
Finally, lab grown meat IS meat. Our bodies can break down and harvest any micronutrients grown into the meat. Furthermore, as developments are made, it's naive to assume the companies producing the lab grown meat won't attempt to add anything important which might be missing.
There's also precedent in the food industry for adding nutrients to food staples - white rice in America is legally required to be enriched. This point also confirms OPs concern is worth thinking about to begin with - the rice nutrient deficiency has caused epidemics in Asia. However, this problem has largely been solved.
Finally, OPs rant seems to start from an adversarial position. The arguments put forward seem to be in bad faith, as they are mostly distilled with minor research on lab-grown meat.