Why is it up to the defense to protect the "defenseless" player on offense?

If you didn't catch the ball, and defended yourself instead, you wouldn't have gotten the f.uck knocked out of you.

Like stam said, there are consequences for you concentrating only on catching the ball. Why should the defender have to babysit you?

They'll ruin a couple playoff games with this bullsh!t, and people are going to lose their minds.
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She was standin' alone over by the juke box, like she'd something to sell.
I said "baby, what's the goin' price?" She told me to go to hell.

Bon Scott - Shot Down in Flames