The trash cans are a thing of Disney lore. Websites give conflicting stats, usually citing either 20 or 30 steps maximum between trash cans. I didn't stop to count it out - my poor spouse had to wait for me to take pictures of them, I suspect neither he nor the other visitors would have appreciated me stopping to measure out paces between each of them - but they appear at much shorter intervals than I have ever seen trash cans anywhere else. The same websites cite Walt himself as instituting the policy of so many trash cans as part of lowering the bar to guests throwing out their rubbish properly. I suspect that we don't see this outside of Disney not because institutions are not interested in lowering the bar to using trash cans but because of how many staff hours it would take to empty that many cans. Space might also be a consideration, too, as who wants to give that much footprint to trash cans?
One type of space that the trash cans at Disney don't take up so much is visual space. They are incorporated into the decor of the attraction, so they don't stick out as utilitarian, they're part of the experience and novelty. The other place Disney does this really well is in the waiting areas to get into rides. Like airports, Disney hosts people who inevitably spend a large amount of time waiting in lines. However, unlike airports, Disney tries to make this wait time as pleasant as possible, and they dress the waiting area in decor matching that of the ride, essentially trying to make the wait itself part of the ride, too.
Of course, airports can't make your wait more entertaining by making the waiting resemble being on an airplane because the vast majority of fliers are far more interested in their destination than the ride. But there are definitely things they could do to make the wait, and the ride less miserable. Unfortunately, there's no incentive to do so. People don't pay to use airports, they pay the airlines, and no airline is going to spearhead improvements in the general airport when they won't inspire anyone to fly with them more often. In fact, there's incentive not to improve, as that "calculated misery cost" is what causes people to pay for things like TSA PreCheck and visitor lounges. Ditto coach vs. First Class on the planes themselves.
There isn't really a point to all this rambling, except to say that user-friendliness has a lot of aspects and that they can make a huge difference to our experiences, even for something as simple as waiting in a line. Necessary but unpleasant experiences can be mitigated by user-friendliness, while good experiences can be enhanced; conversely good experiences can be soured by user-hostile environments and bad ones are transformed from annoying to miserable. This is true on the web as well as in the real world, but I rarely see people comparing the two outside of niche interest sites.
So next time you have a really unpleasant experience somewhere, ask yourself if there's something that could be done to make it more pleasant. If possible, give feedback on it; few places are as user-hostile as airports, and many want to make themselves more welcoming.
*If you ever see me in a museum exhibit, you may find me staring at the ceiling to check out their lighting configuration, or critiquing the layout of object labels.