Injuries are there to make the game more realistic. No worries, that's fine with me.
However, in reality, at least in somel European leagues, it's possible to recruit players in replacement on a a short-period contract, and to take out insurance to partially cover the possible difference in salary. But that doesn't exist on BB.
We could perhaps add paid but non-compulsory insurance to limit the deadweight loss due to the payment of the salary of an injured player.
In the end, there's only the bad side of reality on BB. We just have to cry when a player is out for some days or weeks.