You've obviously never played. Do you have any idea the amount of execution required to successfully run an offense at the tempo of ours? Both of your arguments are absolutely wrong.
What about benching the starters for less talented athletes, so the starters can stay healthy? So it's ok to bench the starters for their health, but sacrifice the safety security of lesser players. . . but on the other hand, the lesser players shouldn't replace a starter due to injury, because then they're at a higher risk for injury.
Do you not understand how absolutely ignorant and delusional this is? You do know that you are in favor of both of these principals, right?