Why do so many people think Joe Burrow will be great in the NFL?

I could see him wind up like Joe Montana.
I could also see him wind up like Jay Cutler.
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ive never been one that thought him being great at the next level was a given. Maybe, maybe not.
Cutler is a horrible example though. He had a better arm but he never proved to have some of the intangibles that Joe has. He wasn’t a good teammate , leader nor did he apparently have the heart. If Joe Burrow doesn’t succeed it will look nothing like Cutler