I agree with what many of the above posters have said: this is a surprisingly tender, gentle scene from a series that otherwise is grimdark and macho to the point of parody and beyond. And I too have no problem with Selina being hurt, not only for the reasons given above but also because Batman as well gets the crap kicked out of him from time to time. (I'm not just thinking of the extreme case of Knightfall, but of other times in various series and continuities when he's lost a fight: Swamp Thing uses the old "one consciousness in multiple bodies" trick to thrash him good; the Mutant Leader in DKR nearly kills him in their first fight, and there are no doubt other instances I'm unfamiliar with.)