I hope you're right...
Also, it's not rude at all. Many people wonder about things like that. So off to a little off-topic excursion:
First off, "blind" does not translate as "lights out" (but it's a very common misconception). Afaik about 90% of all blind people have some kind of residual visual perception, as do I. So on my own computer, in a darkened room, with a very intricate screen setup (that gives any normal-sighted person a serious headache within minutes) I can still read many websites, and this one is actually pretty good for me.
But even if I couldn't (like other users on this forum), there are things like
screenreaders and
braille terminals, which can enable even people without any visual perception to use
certain websites. It's not easy and it takes some nerve, but it can work. In the not too far future (best I can tell) I'll need to use those as well.
The problem is: once you physically put me anyplace I don't already know fairly well, things start to get wonky. Hardly ever know where I really am, can't read any signs, usually can't find doors (a relevant problem for Saturday), often don't know where people are whom I could ask. And lots and lots of nice people not withstanding, those are not always around when needed, and the taxi drivers around here are a somewhat uncertain bunch. Also, sunlight often renders me completely blind, and standing in the middle of the street shrieking for help is not my idea of a fun night out

Hope that sheds some light (no pun intended) on the subject

Cheers
Jack
Mandatory anti-generalisation disclaimer: the stuff I wrote here is from my personal point of view. Other people may (quite literally) see things differently, and find other things easy or difficult that I do. Everybody's different, right?