It's much easier to build a talented roster around a mid player than it is to draft an upgrade from mid to elite at one position. If only because there are many, many more avenues to achieve the former and but one for the latter.
Teams don't upgrade their QB position from mid to elite every year. It's just that the jump from Desmond Ridder to Kirk Cousins is real big.
Those many other options have just as much chance of failing as the one.
What's the average hit rate on an FA signing over $10m? 1 in 3 maybe? And the draft is what? 1 in 6? More or less depending on round.
So we'd have to bring in roughly 15 new players between FA and the draft to be reasonably assured of getting 3-4 quality starters. That's a lot of money wasted.
Whereas a good QB will elevate the team and you need to invest less around him to make up for his shortcomings.
This franchise, and the fanbase, is doing everything it possibly can to ignore the fact we need to move on. The longer we do the worse it gets. I agree it's not this year, the draft sucks, so Kyler gets another chance, but if the pattern continues it's time for him to go.
Personally, as the QB market is so bare this year and there are several desperate teams I'd move him while his value is high and bring in Tannehill, Wilson, Jimmy G, Malik Willis, Fields, Mac Jones or Pickett for a year.