you know, I think sometimes reading can be hazardous to our health, too. There are a million and a half "experts" out there in one thing or another. If we discontinued eating all the food that has been suggested to be bad for us (who else remembers the nitrites in spinach?) there wouldn't be much to eat.
Pretty much, we each need to decide what our particular bodies need and want. Imho, mine does a pretty good jjob of letting me know when I've eaten something it doesn't like) and just do the best we can. It's a veritable minefield out there!
I'm guessing that the OP has read something from a raw vegan site that is saying that cooking vegetables renders them nutritionless. I've read that, but I continue to cook my vegetables. there are not too many veggies I find palatable raw, other than carrots, celery and salad greens, so I may cook even more veggies than other folks, but that's me.