if you’re a professional music composer, there is a specific reason for writing music in a specific scale, each scale does set a different mood in listeners minds , artistic setting, etc..

ex, Schubert – defined these scales as

F Major – is calm and complaisant
E Major – is joyous and shouty

transposing away from the original scale, can ruin some songs, often happens with inexperienced players.

Just transpose it.

I’ve played guitar on off over the years, and the problem with guitar playing, most of the Flat Chord finger positions tie your fingers up in knots, and in some of these fingering positions you can get cramp in the hand, whereas the Sharp Chord finger positions are less stressful on the fingers. As a guitarist you tend to play the 3 main chords in a scale ex in C major, you often just play C, F & G chords (1,4,5) and moving around these chords is very easy and fast compared to moving some of the Flat chords in the Flat major scales.

As sax players, we have the same problem when moving quickly round tricky keys, where its impossible without using some of the alternative keys. So i wouldn’t generalise that all guitar players are lazy, more like their not very experienced.