I said exactly the same thing to someone else the other day!
We do have something in the UK called "The Big Fish Campaign", an awareness campaign launched by UK zoos and aquaria, specifically requesting that stores don't stock "tank busters" as standard - because so many people end up either asking public aquariums to take these fish, or dumping them on them even. So they're trying to raise awareness in the hobby, and also pressuring stores not to stock "tank busters" as standard stocking.
www.practicalfishkeeping.co.uk
At least one of the big chain stores here backs it:
https://www.fishkeeper.co.uk/stories/tankbusters-co-do-you-really-know-what-you-are-taking-on
And my privately owned LFS (before it shut down, because decent LFS's run by passionate hobbyists can't compete against the big chains and online shopping) didn't stock things like common plecos or shovelnose cats, would only special order in fish like that if the new potential owner knew exactly what they were getting, and could show they had a set up suitable for an adult sized fish of the type they wanted.

They did take in, and rehome if they could, some fish if they could manage, like the odd common plec.