Having worked in high end residential, I can tell ya the LAST person who's going to want to use a bidet is ironically also the hypothetical "grandpa" who's not rich enough to hire someone to wipe his a$$.
Coming from a working class background, the perception of "European-ness" is the exact - and possibly only - reason your average American old dude wouldn't use one.
It's literally an ad campaign | marketing problem .. and given how popular pressure washing youtube videos are, there's one angle to work from :-)