There are a lot of barbers hones for sale on Ebay. Judging from that, I would guess that many non-barbers used them.

Anecdotally, when I started using straight razors a Swaty was waiting for me in my wife's kitchen drawer. It was just one of the whetstones that was in the kitchen for sharpening knives and utensils. Thinking out loud... when straights went out of vogue, they disappeared in drawers. But, possibly a lot of barbers hones continued to be used in various non-razor-related ways. So, maybe the usage of hones during "the day" was even more than the incidence of hones now indicates.