ZIP similarly doesn't stand for anything but is styled as such. So I suppose the pushback is more against being used as a stand-in for generic raw image formats.
Edit: just noticed your comment was greyed but I didn't downvote it fwiw.
You can also find tons of instances of people referring to Apple's computers as MACs. And that one is even worse because MAC is an actual computer-hardware term.
So "RAW" may not be a well-known acronym, but it doesn't mean it will never be.
The Brits suffer from the opposite problem: making acronyms into regular proper names. It's endemic over there; their articles are replete with references to the nonexistent "Nasa," "Nato," and other entities. In at least one case in the last few years they did this to a piece of legislation where there was actually a British company with the name they were misusing.
You can find millions of instances of any given literacy-impaired error. "Would of" and "your not going to find this" are wrong... but they're out there by the boatload. No need to propagate them further.