Lallana and Allen have both proved themselves to an extent that Ilori hasn't even got close to.
They've had seasons where they've posted strong numbers in terms of appearances and put in top level performances, Ilori thus far has done neither.
If Ilori had gone to Grandada and Bordeaux and absolutely blown the league away with his quality and level of performance, or managed to stay fit enough to manage more than the paltry 24 apps in 2 seasons then we might have indulged his injuries in a way that we do with Allen/Lallana/Sakho/Lucas but he didn't.
He's proved nothing. And so his injuries are not indulged to the same extent as those players, because he hasn't earned the right for them to be.
We clearly don't indulge Sakho's injuries though. If Craig has it right, then Sakho isn't a part of Brendan's preferred first XI purely because of his inability to stay fit. So, we're obviously not indulging his injury troubles at all.
Ilori's injuries have obviously prevented him from reaching his potential. They never let him get a steady string of games and therefore, hampered his development significantly. Now, if the manager viewed him as a serious talent if he could get over his injury troubles, he would not have been sent on loan and would instead be looking at going to the club's best specialists to get the player fit again. Instead, he's gone on loan again and got injured again. Clearly, the manager doesn't rate him highly enough for any time to be invested into his medical problems.
Ultimately, it comes down to how highly the manager rates him. The manager obviously indulges some players with injuries but not others. And some of the players that have been indulged are not in the opinion of many here among our absolute best players. One player though that has not been indulged is our best central defender according to most. Yet he has received no favours. I'll gladly accept Brendan doesn't rate Ilori, but to bring up his injury issues is a bit convenient and really smacks of conjecture rather than anything else.