I mean, yeah, but at the same time, stocks are different from inventory because they (can) appreciate in value. Inventory in a store depreciates over time.
There are two and a half reasons to sell a stock: because you need the cash, or because you think the stock has stopped appreciating and will depreciate going forward.
Once a stock has become a depreciating asset it's really no different than the bedroom set that's been sitting in the corner of the showroom for too long, and before too long they'll be happy to take 50% or 40% or less of what they were originally asking just to get it off their hands, even if they end up selling at a nominal loss at the end.
So I'd argue that a stock being "dumped" really is no different than a printer being sold, but that that doesn't look any better for the stock than the negative term would suggest.
Your credentials aren't really relevant unless you're making an ad hominem argument to the effect that we should believe everything you say about finance because you're an authority.
Use of slang or jargon in a headline only subtracts points, in my gradebook. And if dumping is mostly just selling, why not say selling? Well the answer is "because clickbait." A devaluation, insult, or attack on Tesla generates more "engagement" than a sale of Tesla.
Besides which, dumping is an analogy. Nothing is literally being dumped, just like nothing ever gets literally pumped. Nor does anyone ever literally "take a bath" or "get taken to the cleaners." Nothing "crashes" and nothing "booms." And unless people start fucking cows or grabbing salmon out of rivers with their hands and biting their heads off, nobody is "bearish" or "bullish" either.
Just want to point out that you've got insider knowledge and if you want people to be better educated about distinctions and jargon you gotta educate them. Just referring people to the great oracle called Google leads to the bad old days of googling a question and only getting threads where frustrated specialists snarkily suggest googling instead of asking.
Really though, the hardest part of googling the answer to a question is knowing what to call things and how to phrase your own questions. Google "is amazon dumping printers", its about E-waste and recycling. Of course, you wouldn't do that because you know better, but thats sort of the point. You are the one who knows better, not the questant who is sort of confused definitionally.
Edit: ok so dumping=selling the whole lot
I guess that makes sense. I think this post explained it better https://news.ycombinator.com/item?id=27633163