I think it's a matter of several factors:
A) Need to draft/develop a franchise QB
B) A non-Fitz veteran to bridge the gap (2 seasons max) so we actually develop the draft pick/no trial by fire rookie season
C) Reasonable cost: very late/no draft picks, reasonable $
I say non-Fitz because, and I think its clear that many feel this way, he cannot make all the throws. Under Fitz, we cant even tell if Gailey's system is progressing even the slightest.
Given that criteria, and hoping for some upside burst from a new environment, he comes up on the radar (Alex Smith does as well). I think that's all it is really.
Or just read NoSaint's post as I just said the same thing. Sorry!
Woof.