Well unless it was some type of night light that was a permanent fixture, people would steal them and then Disney would have to replace them, then costs would go up to cover the theft and people would gripe about that.
So I guess you will have to bring your own like we do.
Have not seen those, have seen the ones on the hair dryers and I really don't like them. The hair dryers are a piece of junk and the light always flickers. I have to always close the bathroom door on them or unplug it.
What I do is just leave one in my suitcase and I always have it with me.
We take one with us all the time. It's one of those with the light and deodorant attached to it. helps to make the room smell a bit better, especially if you got one of those that someone smoked in.
I always pack a couple night lights, but there's no plug inside most of the bathrooms (if the vanity is located outside). Maybe they could put the bathroom light on a dimmer switch or something. The tap lights are a good idea though. I may have to toss one in my suitcase the next time I'm staying somewhere with a dark bathroom (my next three trips will have plugs in the bathroom - so the regular nightlight will work).
I just leave the bathroom light on and then leave the door open just a crack, that's enough of a nightlight for us. We generally don't get up in the middle of the night though, but if we did, there would be enough light for us to find our way there without fumbling around.
I don't even turn the light on at home if I get up in the night...the bright light is hard on the eyes...plus it wakes you up to much and makes it hard to get back to sleep. I'm definately going to pack a nightlight so I don't have to feel my way around in the dark
And then there are people like us who don't want any light at all in the room. I just do the "feel" method of finding my way around. My husband never moves at night. If we have a light on in the room, niether one of us sleeps very well.