It's relevant because we have won 27 out of 42 games with him under center. It's relevant because, as evidenced by other teams, finding a QB who can win is a very hard thing to do.
So while I believe we could upgrade the position, I look at the available options and weigh the risks vs the benefits. We do not have a #1 pick in 2019 & if we even if we did #1 pick QB also have a high bust rate and this class is not looking strong. 2020 is a different story.
We could look in FA, but you're getting retreads that have had the same issues or worse then Prescott. Look at what the Vikings have done, for example. They made a QB change (making KC the highest paid QB, bc that's the cost in free agency) and got worse! Now they are stuck.
I'm all for upgrading the QB position, but I do not have a such a simplistic view on the situation like many. I realize that you have to make a smart decision on when to move on and who to pursue, because any change at this key position will have effects that influence multiple seasons.