NFL roster for 4 years and for 2 years in a row lost the back up spot. Most QBs who have great to elite careers in the NFL, like some believe Lance can still have. Haven't struggled to even keep the QB2 spot on an NFL roster. And didn't throw 4 or 5 INTs against 3rd and 4th stringers in preseason. Including the ones who sat for a couple of years and then went on to be top 5 to elite QBs at some point in their NFL careers.
The only and main reason some are clinging onto hope with Lance is being he was drafted 3rd overall. Doesn't matter his age, as QBs around his same age drafted lower and in the same position he is right now. Wouldn't be getting this much time to develop or show they can be a starting QB in the NFL some day. If he sits for another year and is still in the same spot as far as development goes, then what? He had a chance to step forward and at least win the QB2 spot this year. Which is would have if he really showed enough development even from last year. Yet one more year is going to show he can be a reliable starting QB for the Cowboys for the foreseeable future. And one that can get the Cowboys into the playoffs, lead the Cowboys past the 2nd round and eventually command the Cowboys to a Super Bowl win?