This is roughly the equivalent of saying "I'm not a Christian, but I have taken Jesus Christ as my personal lord and savior.
My opinions on this issue, Tom left because Tom wanted to leave. I can't entirely blame him, 20 years with the same cranky demanding boss gets old, even if you are successful. Ultimately Tom wasn't staying here because the team was in need of a turnover and he didn't want to spend his golden football years as part of a rebuild that would be completed around the same time he was finished.
It's not big mean Bill booted his ass, because if that were true it would have happened in 2017.
Mac is Mac. I don't expect him to be Tom because no one is going to be Tom.
Allen might be better, but since he's not available that comparison is academic.
Right now Mahomes, Allen, Herbert, Prescott and maybe Murray (EDIT Forgot Burrow) are the best young QBs in the game. And comparing Mac to them is also academic because none of them were available. Were I a Dolphins fan, it would be fair to compare Tua and Herbert (and get really riled up about that).
The incredible irony of this whole thing is I recall having the exact same arguments with Bledsonians 20 years ago. Time really is a flat circle.