When looking at guitar amplifiers, the entire goal here is creativity of sound texture. This is an artist area where the artist dials in and decides how the guitar is "supposed to sound". The circuits for guitar amps are radically different because they focus on how to "create a tone" based on the guitar string electro-magnetic pickups and adjustment dials available for the player. Things like tube signal sag, tube saturation distortion and coloration have a huge impact here. To this date, there is not a solid state device that can -exactly- reproduce the texture and coloration of tube distortation and saturation/breakup. There are some devices that can come close, such as Axe-FX hardware and many VST plugins available for audio DAW software.
On the other hand, home audio equipment is really focused on "reproducing the tone". Essentially, the "reproduction" of the signal exactly as it enters the preamp/amp. There are many opinions here. Some advocate a completely neutral/transparent reproduction with no coloration at all. Others prefer some sort of coloration that could be represented as a lush or warm or smoothed type of sound. These are very subtle effects, but they can mean a world of difference to the audiophile listener. Even there there is this slight "coloration" to the tone, it is NOWHERE near as drastic or extreme as you will find in guitar amps.
