It's not that big a deal. It's just preseason…
Accountability in the preseason is a difficult tightrope that we all must tread carefully. We are often quick to provide praise when a player plays outstanding football in the preseason and we are just as quick (maybe even more so) to place blame when a player plays poorly. Remember a few years ago when Orton threw a bunch of interceptions in preseason and was essentially booed out of the stadium? Well, he threw 1 interception through the first 8 weeks of that regular season… and it was on a Hail Mary pass just before halftime against the Patriots. Were the 3 interceptions at the beginning of the preseason any indication of how he would play during the regular season? Hardly.
That said, the preseason is not meaningless. If your offensive line is getting blown up in the preseason and can’t hold a block to save their lives (or Peyton Manning's life)… things might not be pretty during the regular season. Procedural stuff (penalties, missed assignments, missed reads, etc.) can be corrected. A lack of talent, however, cannot be corrected so easily.
The frustration begins to mount, however, when players start getting hurt. Take Tim Tebow, for instance. He dove for a last second touchdown in the preseason week 1 game against the Bengals in 2010, aggravating his ribs. If you'll remember, there was a ton of criticism for him diving at the end of a "meaningless" game in a situation where scoring wouldn't have won the game.
Here was Mike Klis' take on it, at the time.
All that was missing when Tim Tebow took off running on the final play of the game was significance... Tebow's touchdown would not turn Broncos defeat into victory. Victory would not give the Broncos a Super Bowl title.