I learnt piano for years and the difference between flats and sharps is very clearly defined. Yes a Gb is the same note as an F# but if you want to learn the scales as they are intended to be learnt then you should make the distinction between flats and sharps. You would never be able to properly site read without learning the scales with flats and sharps as they indicate the key you are playing in and are mared beside the clef. From what I remember it's only the naturals and accidentals that appear in the actual notation from that point on. At the end of the day though it doesnt make much of a difference to anything unless you want to get big into theory and learn site reading. Just pointing out the difference!