Because, as stated earlier, this isn't 2003. It says something that Culpepper couldn't get a job anywhere. Put plainly, the man, removed from his original offense in Minny, just is not good.
Part of the problem is that he thinks he IS that good. He still believes he's a top 5 NFL QB. I'm sure he could be serviceable, but his head isn't in the right place for that to happen.
The Packers offered him a $1M/1yr deal prior to the draft. He flat out rejected it because it wasn't to be the unquestioned starter. Will someone please get C-Pep a wakeup call?
More? He also serves as his own agent, which makes teams not want to deal with him. Many things are said in negotiations that players never hear. When a player represents himself, he typically is not able to remain objective when doing the business side of things. Do you think Daunte would be able to do that? Uhh ... no.
Finally, the Pats want a QB who will try to limit mistakes. That was never Culpepper's game even when he was good.