My knock around ABG gets played around the house, outside on the deck, in the back yard by the fire pit. It gets tossed in the jeep for camping and road trips.
My good ABG gets 100% of the gigs I play; duo-quartet jazz - clubs, restaurants, parties, outdoor events, etc...
I can see where the ambient noise of a music store, maybe coupled with a poor set up, might lead to a rather disappointing audition. There's also the fact that some ABG's are smaller/shallower than others, thus will not be as loud.
Both of my basses are loud enough to hear over the TV, or playing with BIAB/play-a-longs. The camping bass can be heard around a campfire with finger picking guitars, sitting in a stream with moving water, and even by friends in a neighboring campsite ~60' away.
Point is to amplify the inherent acoustic tone of the bass. With all the discussion here regarding tone... strings, pick ups, P/J/PJ, body wood, neck wood, fingerboard wood, frets, fretless, neck through, bolt on, Badass II or string through, playing at the bridge or neck... To assume the tone of a jumbo size, hollow body acoustic with piezos wouldn't offer its own timber, is well... perhaps you are missing something.
Bottom line...
They are what they are. False expectations will certainly disappoint those who are looking for big volume. A well set up/well played ABG should be able to hang with one or two acoustic guitars. More people sitting in? Need to be louder? Plug in. That's why they have onboard electronics.
ABG's, like any slab, are about tone. If it's the tone you want, than you'll figure out how to apply it.