As soon as you can show me where it is illegal to purchase a hydraulic press in a brick and mortar store, you might have a point about the "anything to do with marijuana" thing. Look at what else they sell that is clearly geared for canna. Much more so than some hydraulic press.
I will maintain my argument that this is either a safety/lawsuit issue, or something else that has nothing to do with canna, or perhaps nothing at all.
Not sure where you are going with the YouTube thing. YouTube pulls channels all the time for a plethora of reasons. Not saying I agree with their methods, but I am not convinced this or the Amazon stuff is some government intervention.
I can order all the rosin presses I want. And I live in a state where they don't take too kindly to the herb. Methinks this is much ado about nothing.
I don't know the reasons, but what was clear is someone did get an order pulled, you can buy a bigger variety of rosin presses in California than in Michigan, and if it was "Health and Safety" then the UK would have cracked down on it because, believe it or not, the UK is crazier about that sort of thing than even the US.
The YouTube thing has been that they have pulled assorted channels regarding growing which had been ok for months or even years, but suddenly "broke the terms of service". We know that's arse covering, but who do you think they want to cover their arses from? Noob growers who don't get results? No, that's covering their arses from someone higher up the food chain.
The same seems to applying to the USA, depending on state, and is again looking like an arse covering exercise, but if it was a "safety" issue then you would expect the moonhowlers in California to be the ones at the forefront of any "safety" issues and said "safety" issues would apply across the entirety of the country.
We'll see in time if there's a concentrated effort to crack down on any paraphernalia or equipment related to canna, for even in the most litigious societies, and the UK has caught up considerably with the US in that respect with an incredible amount of frivolous cases in the last decade or so, with "labelling" being the craziest where they've reached the point where household bleach has been labelled as "suitable for vegans", Amazon would not be the one being sued for anything as they don't actually sell the product as they are just a marketplace for others, same as the Bay of the E (where you see presses clearly marked as coming from China, Canada, and so on, over "US").
It may be that the binned order that started all this off was because of a ripper, taking the money but not delivering, but it could also be a conscious effort by the likes of Amazon to restrict sales of certain things for reasons they have not admitted yet and, well, not all local, state or federal decisions are put into the public domain.
Like with over here where various places suddenly refused to deliver CBD to Belgium with no announcement, but we know the reason why, time will tell. It could have been just someone being overzealous, it could have been a ripper, or it could be the start of restrictions of certain products across state lines, the latter being a ridiculous situation altogether which I apply to weed itself as more and more states move to some form of legalisation, which could lead to the Feds actually gaining valuable revenue by allowing authorised and legal transportation between "growing" states and "medical" (for example) states and adding a small levy per ton transported, which could also be directed at combating the smuggling of far worse substances that seem to be able to cross the country with impunity. But that would mean "common sense" and when you hear the latest nonsense at the Canadian border, or at least whatthey are proposing, then you know "common sense" is something that is not in plentiful supply in DC, and certainly isn't in any sort of supply here in my neck of the woods where policies have led to an explosion in the availability in the underground market.
As I say, time will tell.