Didn't TO write in his book about a recurring groin injury, rationalizing that he works out so hard in the offseason that he shouldn't be pushed so hard in training camp?
IF TO has a "phantom" injury, I think that is a fairly common practice among NFL vets. Sure, it chafes all of us who have to work every day for a much lower wage (though I'll admit to taking a sick day here and there for phantom illnesses). I honestly think he'll be back once the two-a-days are over.
If he is really hurt, then there is obviously no reason to rush him out there.
Finally, I'll add that if the press weren't continually asking about it, I doubt anyone would be very worked up. Part of the reason some fans are so upset is that it gives the media and opposing fans a way to dig at them. If TO starts week 1 and produces in his typical fashion, no one will talk about this incident until he does it again next TC.