...and yet the Bucs are going to the Superbowl with Brady, when they had no shot beforehand.
Favre spent a full season with the Falcons before being traded, so I wouldn't count him as being "drafted" by the Packers.
I think if you look at it from a different perspective, say the 2nd (aka big) contract of QB's, then Drew Brees falls right into that category.
Stafford is on or going on his 3rd contract, so he'd be a short-term plan. But Watson is just beginning his 2nd contract term, aka the prime years. Like Brees. Like Favre. Like Warner.
Granted, I just don't think we have the space or capital to give up what they'd want for Watson, so this is all speculation.
But for me, I'd put Watson in the Brees/Favre/Warner category.