Why would you be preventing yourself from good board vision that way? Last time I checked boards didn'd have the coords painted on them.
When Fischer calculated his combinations, algebraic notation wasn't even used. As long as you can imagine the knight on that square, it doesn't really matter what you call it.

When you are calculating moves in your head, do you name the squares in algebraic notation (or some other notation)?
When I calculate, in my head I might think something like "I move my knight there and then he moves his pawn there" instead of thinking "I move my knight to c3 and then he moves his pawn to d4". By not referring to the squares in algebraic notation, I feel that I might be preventing myself from developing good board vision.