If Ben Russell had not been injured last year, Poling could have been waiting his turn like Maleek Irons?
Russell was a very good player, and Ohio would be better off with him playing than they are at the moment.
If he were still playing, yes, Poling's situation would have been similar to Iron's, or should have been. Poling would have played some, and as he proved himself, he'd have played more, exactly as is happening with Irons. If, at some point, he showed he was better than Russell, he would have moved ahead of him on the depth chart. That's how it's done in all sports at all levels, and there have been plenty of cases where it has happened at Ohio.
This whole "you can never move ahead of anyone on the depth chart no matter how much talent you have" narrative just shows that people have been watching too much politics, and they argue the same way. The examples of cases where players moved up the depth chart are numerous, and happen all the time. To argue that they should have benched Russell, and told him, "look, we know you have worked hard, and we know you're one of the best MLB's in MAC, but we've got this young hotshot kid and we think that some day he will be better than you, so we're benching you do that he can develop faster" is ludicrous, and I can't think of a better way to destroy the morale of a team.