ITA. In the short term, hair IS way more manageable, smoother, silker, etc. with heat (that's why it's so seductive and appears to "help" hair!). It's a "short cut" with a huge downside for some, because over time, heat thins and causes breakage that happens little bit at a time and is not noticeable (all the "little" broken pieces in the sink!) but the damage is done, week after week, even with the best of products, there's damage however limited. For years I couldn't understand why my hair wouldn't grow past shoulders, but once I gave up heat, my hair has grown like weeds. It DOES take little more TLC and time to manage, but thicker, longer without heat. I know this not for everyone, but for me, it was God's blessing and Grace and well worth the extra effort and time . . .
Just my humble opinion 'cus it took quite a while for me to realize this, I couldn't CONCEIVE of managing my 4B hair without heat, but it can be done and done very well indeed with awesome results. My mom and rest of family still can't get over how long and thick my hair is cuz I ain't never had no hair and no one in family has hair like I do now (LOL!). A coupla cousins or two are finally listening to me and are seeing results, but my biggest hair culprit was heat . . .