Would you play golf with only one club? Unlike electrics, acoustics can only produce one type of "sound" depending on the construction and types of woods used, so I think it is necessary to own several types of acoustic guitars depending on the type of music/song you're playing.
In my opinion (my wife doesn't agree) it would be ideal for an acoustic guitar player to own combos of rosewood/spruce, rosewood/cedar, mahogany/spruce, mahogany/cedar and all-mahogany guitars, with ovangkol , koa, etc also considered. Various shapes (jumbo, dreadnaught, auditorium, concert, etc will also produce different sounds/tones so there are a lot of combos to choose from. Then there are 12-strings, alternate tunings, Nashville high-tuning etc.
No way should one only own one acoustic guitar.
I want to read my own water, choose my own path, write my own songs