The point he was trying to make is flawed and the comparison is the reason it is flawed.. You are talking about a QB with many years and many different players and coaches. Tom Brady has been successful every year of his long career, Keenum has been successful once. It's just not a good comparison.
A better one would be Kirk Cousins. And guess what...Cousins has to prove himself this year too.
Further more, he's saying "Tom Brady would be a pile of ---- to 31 other teams" No one said that. No one says that Keenum is a pile of anything, simply that he's unproven. That isn't an insult... I'm not sure why it is being taken as an insult...
I guess I don't understand why it is unreasonable to say that Case who has had one season where he played well after a lot of seasons where he didn't needs to prove he's capable of doing what he did last year CONSISTENTLY. No one is saying he's trash or that he can't do it, we are just saying we want to see it with our own eyes in DENVER before we start going crazy on the hype train.