How can you justify NOT starting AJ McCarron the rest of the season?

[WeezyBengal]

(11-06-2017, 11:15 AM)THE PISTONS Wrote: The why not start AJ? You basically destroy Daltons career here and McCarron likely won't do better behind this line...so you'd then need to find a new QB for next year too.

Fixing a line is hard. Fixing a line and finding a starting QB is near impossible.

How are we destroying Dalton's career if we use the rest of the season to evaluate AJ?