I'm sorry, is it that much to ask that you actually keep to the topic of the thread, which has very little to do with Garoppolo and even less to do with Brady?
The point here is that if we do move Jimmy G, and something happens to Brady (which are assumptions asked of us by the OP and not topics for debate), Brissett is probably not ready for primary backup duties. He didn't look bad in his emergency cameo, but that's only because we hold emergency cameos to a very low standard. By the standard of a starting quarterback Brissett sucked the big one. So if we do deal Garoppolo, and I'm not making any value judgements in this thread about whether we should or should not do so, we should probably acquire a veteran backup of some sort.
You brought Garrapolo into it, not me.