Larian boss Swen Vincke claimed that multiple audiences had responded favorably to the scene, deeming it "hilarious." Baldur's Gate III Lead Writer Adam Smith also issued a statement about the bear scene.
"Have you ever considered the joys and pleasures of sexual congress with a wildshaped Druid?" Smith asked. "Because at Larian, we have, and ultimately landed on the side of giving the people what they want: tender, consensual romance with a man temporarily transformed into a grizzly bear."

This makes it sounds like this was mainly included for humor. I'm sure they're aware furries exist and this would appeal to them, but as an outsider seeing this out of context, this just seems like a humorous option for people who don't take romantic parts of games very seriously.
Consider the existence of Hatoful Boyfriend, a tame dating simulator where every partner option is a bird. Most people who play that aren't genuinely interested in getting romantically involved with pigeons.