The acoustic guitar is a context unto itself, thus it’s appeal for solo work. A small universe of sounds is available to the careful player and listener.
The electric guitar requires an amp to complete a system. Without amplification, a solid or semi-hollow body electric guitar has minimum, barely audible resonance. Amplification brings out the resonances and overtones that are the magical qualities associated with electric guitars. The guitar must be played and amplified loudly to make the electric guitar sound vibrate to its potential. electric guitar = electric guitar + amplifier.
Also, for me, the electric guitar requires the context of an ensemble, as its harmonic/resonant capabilities (particularly at solo volume levels) are smaller than those available to an acoustic guitar in a solo context.
The reason acoustic guitars sound mostly bad amplified is because the piezo and sound hole pick-ups don’t “pick up” the qualities of the resonating body (guitar top) that is the acoustic transducer, nor do they pick up the bi-tones that result from a stopping a string with a finger on the fretboard.
The acoustic guitar is about maximum vibration before amplification while the electric guitar is the inverse.
It all about resonating bodies.