Well why the fuck did Robbins not protect and nurture the other strikers we have, you know, the ones who couldn't score for toffee.
I have to disagree about how he's been used, there's a difference between easing a young player into the squad gently, and just refusing to use him out of pure pig headed stubbornness, imho Robbins is guilty of the latter.
In the end Robbins ran out of excuses, and was left with no alternative but to play him, or else the fans would have eventually turned on him. Let's not forget if it wasn't for injuries and unavailability, he'd still be waiting his chance.
I'm sure he'll require resting a few times between now and the end of the season to keep him sharp and fresh, but he should now be a regular in the starting line up.