It's been accepted in my experience, and sometimes its probably a legitimate reason. Similar to DAS previously, GR cast aren't really told to question anything cause that opens up legal issues. It used to be that the person in the stroller needs it as much as someone with a wheelchair needs their chair. For most people, that definition of the tag has become incredibly blurred if not outright not a thing anymore.
And GR can't really stop it. As others said,updating tags at least limits them to your party for your trip. You can't transfer it, sell it, give your stroller to someone else for their trip(locals absolutely do all these things), or keep it on their for 6 years even if your kid you got it for is now walking and isnt using that stroller(maybe they have a chair now) and you have your baby in old tagged stroller.
All those things are happening and Disney is fully within their rights to look at these things.
The proliferation of park advice online post covid definitely heavily contributed to the spike in DAS and Tags. So many of these systems used to be unknown or things you really had to research to use. Now you go on Facebook and you see, "want to know how to KEEP your stroller with you at disney?!"
Disney is almost being forced to look at these things now.