It's easier and better to just make a new YouTube account or use incognito mode. The only benefit I see from FreeTube is no ads. This can be replicated by just using an adblocker.
Having watch history and other data tied to an account is more convenient since you can access it anywhere and YouTube can recommend videos for you to watch which is a killer feature that FreeTube lacks.
Nope. No ads as in no sponsor ads either. You cant replicate that with an adblocker.
Also it prevents youtube from making a profile out of what you consume.
That's not your typical adblocker. That's an extra one that you have to trust to give access to all of your website data, on top of that. Freetube uses the API, I prefer that approach to trusting random extensions that get automatic updates.
Having watch history and other data tied to an account is more convenient since you can access it anywhere and YouTube can recommend videos for you to watch which is a killer feature that FreeTube lacks.