Not true. You always run the risk of bricking the phone making it unuseable. If the ROM you download gets corrupted it could cause a bootloop, not terminal but annoying nonetheless. You will void your warranty. If you don't use a custom ROM you shouldn't lose the OTA updates. If you root, don't delete the "bloatware" apps, just disable or freeze them. Usually if you follow the directions closely you can root your phone with little to no problems. Good luck!
This post is Incredible 2