I think most people simply don't know this and most would probably not buy them for all the reasons you mentioned above. For me, I do grow some crosses like this because of the challenge to get them to bloom. But, if they were to bloom out unattractively(in my eyes) I wouldn't keep it.After all this, Nick on SOF said he'd take the rejects! (We have somewhere to send them!)
Personally I just don't get it. when the odds are against you (and doesn't everyone pretty much have limited space), why would you want to spend good money first & then invest the time, upkeep, electric, heating, etc. in a plant that's not going to bloom or once in a 10 year time span?