Jimmy G (NE) to SF 49ers for a 2nd rounder

I dont get it.....I guess Brady plays until he is 52? I mean, wtf.....and only a 2nd? Werent they being offered more?
I hope god forbid Brady doesnt go down.....


www.si.com/nfl/2017/10/30/jimmy-garoppolo-trade-patriots-49ers