For the health of the league as a whole, is probably the best argument. The Yankees still need teams to play against, so they subsidize the Rays, for example. Revenue sharing is fairly common in professional sports. Interesting to me that it's being considered at the level of OHL, or at least mused about.
The real question is whether parity is actually a good thing or not. You can make a strong argument that sports leagues are better when there are dominant teams that everyone is trying to take down, or rivalries, rather than complete parity and all teams having records close to .500. The NFL vs MLB argument, essentially. Is it better to have a league where it's hard to predict playoff teams before the season, due to small sample size variance and enforced parity through rigid drafts and a hard salary cap, or is it better to have a league with strong contenders known at the outset every year that the other teams are trying to take down? I don't know if there is a right answer or not (probably not, it's probably just personal preference), but it's certainly interesting to think in the context of the OHL.
And of course, it's more likely that one would want parity if you are one of the "have-nots", since we all love our cheering for laundry...