We now have much weaker immune systems because of cooking food? Dude, seriously what the fuck are you talking about? Even when we were eating raw foods the average life span of a human being was in the low 30's, it's now in the mid 70's and is increasing. People aren't dropping dead because of raw infected food poisoning them and that's certainly added to the average life span of human beings. Cooking food isn't the soul reason for this longevity increase (advancement of medicine and pharmacology being a big part of it) but it certainly has helped us from dropping dead from uncooked infected food.
When the incandescent light bulb was introduced people said we all would go blind eventually, that never happened. When microwaves were introduced everyone said we would get cancer, the food would be poisoned and that they were more harmful than good, that never happened. Most of the negative information floating around about them is just outright myth and complete misunderstanding of the technology.
There's no way around the fact that you are never going to get every single nutrient from a food that it has to offer without some degradation to it's value, that certainly hasn't stopped people from using them and getting a healthy dose of nutrition from microwaved foods.
