I think you are looking for some sort of justification to argue that folks who haven't owned an RV with slides don't have sound reasons for not having slides.
I'll reiterate what I said at the beginning: What does it matter? If you are happy with your slides, then enjoy them. If someone else doesn't like them, then they can enjoy life without them.
People make decisions everyday about things they haven't tried. Sure, some may be making a decision based on "assumptions" rather than "personal experience" but that doesn't make it less accurate for them.
Just because YOU have slides and like them doesn't mean everyone must agree with you.
And just because someone else says "I don't want one because I don't want to have to deploy it to use the bathroom" doesn't mean they are wrong.
