It's like a thirty minute city. You want those services nearish to you but never so close that they'd effect property value. "Nobody" wants to live next to a high school - your house might be TP'd, but you want a good school within bus range, "Nobody" wants to live next to a super market, they have large parking lots and are "undesirable" but you want to be able to drive half a dozen blocks to it.

I've never thought of the B in NIMBY as literally meaning backyard - it figuratively means "near enough to effect me" but people still want it within reach - so the ultimate NIMBY dream would likely be to live in an island of placid suburbia surround by a ring of vital services that are just far away enough that you don't need to see them every day.

(There's also, I think, a separate environmental NIMBYism but that's a really strange concept and usually more of a deliberate misinterpretation by people with an agenda to push - I'm more concerned with city service NIMBYism around public transit, food availability, hospitals, etc...)

Is that what YIMBY activists do? Live exclusively in SFHs and make everyone else build apartments?