why can't we do ... is easily the scariest thing any non-technical manager can say.
My manager used it quite a bit.
Why can't we do a help page as good as company X?
Well, we can but it might take 3 FTE for 3 months
Why can't we can't we have feature W?
We can but we have features X,Y and Z to deliver to customers and nobody is asking for feature W
and so on
