So you're sorry, so...?

So if Jeremy Corbyn becomes the leader of the Labour party, he will apologise on behalf of the party for the Iraq war.  So...??  I was against the decision at the time and have posted about it several times since, but what use (to me at least) is an apology from a man who was not involved in the decision and indeed voted against it. Pointless, it seem to me.  Now if Tony Blair were to apologise...  But that's never going to happen, is it?