I wonder if this is a stupid question but I can't work the answer out and I don't remember seeing it answered before so I'll risk it...

Today we're running at 106% profitability vs LTC whilst mining 66% LTC.  This seems to mean that the remaining 33% of has power is generating 6% additional profitability over purely mining LTC.  Why do we mine LTC at all when the other 33% is driving the increase in profitability over a pure LTC play?

I know there's a good reason I just can't work it out (unless it's purely a hedge against the other coins being worse than LTC so diluting that risk)!

Thanks

Miles