Well, also because if we moved on right after a SB win, fans would lose their minds that much more. I guess pre-2019 was a contract negotiation too, which resulted in 1 more year with a no-franchise-tag clause.
And good for him. His interests and ours just diverged.
In fact, if we have a season, I'd love any outcome for Brady. The good sport in me says, "Go on get your ring." The other part says "How sweet that would be if he totally collapses?" (I know, not very mature, but he got paid, albeit somewhat under market value, for the memories. Fair game now. I'm not and never was a Brady fan, I'm a fan of Brady for 20 years of contributions to the Patriots.) That said, Right back on the bandwagon if he starts winning. I totally know I will hypocritically be all-in on whichever viewpoint I end up taking.
But yeah how cool would it be for the machine to keep rolling with Stidh the Kid under center (or Kaepernick for that matter, if that actually happens)?