My in laws live in an area that's under an airport flight path, in fairly close proximity to train tracks, as well as near a well traveled highway. As they've lived there, the area's gotten more and more built up and MIL is getting sick of it and jokes she wants to move to a place that's further from "Planes, trains and automobiles". Though she admits she'd be alright with trains really, it's mostly the planes and sounds of the highway that get on her nerves.
And she does complain to us but has never tried to get flight paths rerouted so I wouldn't call her a snowflake.
Also I once was chatting with someone who lives in my town and looked to be about 80 or so. He told me that when the steamies used to come through our town, their childhood homes would get filled with soot. Mothers would take down their wash from the lines when the trains were expected to come through, then put it back on the line later. But it was spoken about like it's just a fact of life when you live in a town where steam engines are frequently going through, rather than complaining.
I think after a while too, you just get used to the sound. I know when I visited a friend who lives close to the rails in her town, I heard the train pass the first night but every other night I slept right through it.