Cry it out

Why are people so mean and against cry it out?? I don't care what you did with your kid, im doing whats best for mine and my husbands sanity and to help my son sleep on his own. No he doesn't have any blankets or toys because it increases SIDS, i dont care how you slept with your child in your bed and how he/she was just fine. Sorry i just had to vent.