yeah, that wasnt really about the instruments though
im definitely NOT knocking having multiple options (i don't even own a guitar, but i know which one i would get as a second one

), but, generalizing, guitarists just tend to **** things up option wise (wrong amps, wrong pedals, having no clue about using said stuff)
but ill say this tho, a beatmaker with multiple mpc's usually can say in quite a lot of detail why he has each one them.. while the usual guitarist has one favorite (the one that makes for the least bad signal chain, combined with the rest of the goofily thought out set up... for example a thin sounding guitar will be the best choice if you had thoughts like 'yeah, bass should be maxed, i need some weight to my sound' while setting up your amp)
but yeah, that ignorance im describing can be due to my personal experiences