That’s only an appeal to ridicule. If those are valid, here’s an opposing one:
If this is not true, then any company can violate the GPL all it likes just by funneling all its products through a second company, like a reseller.
That the GPL potentially fails to achieve what it intends to is neither a legal argument, nor particularly surprising.
E.g. this sort of thing https://www.tomshardware.com/video-games/pc-gaming/steam-che...
The GPL notably allows for the sale, it was legal here.
It's the contract that's the violation, isn't it? What would the first sale doctrine be if in order to get a copy you could be required to sign a contract not to exercise your rights under it? For that matter, how could state-level contract law override the federal first sale doctrine?
The "derivative work" hack also seems kind of fragile. The normal way to get someone to agree to something is that they need a right from the license, which they then don't get if they don't agree to it. But if it doesn't give them anything that they need then "there are ways to use the copy they own and have a right to use without agreeing to any additional terms" is more like the default you're trying to hack your way out of than something they're exploiting a loophole to get into, and where does that leave you if anything slips?
Suppose Alice is a three year old. She owns the copy, she presses the button and now she has a running copy even though she's not competent to enter into a contract, and then Bob buys it from her. Or Alice owns the copy and Carol presses the button, and then maybe Carol could be sued, but also maybe Carol lives in another country, and either way Alice now owns a running copy she never agreed not to sell. And then you want to be able to say "but that's cheating" except that it's not any less cheating than what you were doing to try to get them to agree to it.
EULA's get around this by forcing the end user to become a party to the contract via a click wrap agreement. There is usually no such click wrap agreement binding the distributor in the case of the GPL. And the GPL doesn't require the creation or maintenance of such a click wrap agreement so the manufacturer would be free to remove it even if the original software had one.
The copyright doesn’t go away when copies are sold to a distributor. Someone (probably the manufacturer) still has legal obligations to the copyright holder.
A sale of an object does not transfer those licenses (but those licenses are still valid on the seller - a manufacturer selling widgets will have to obey the GPL clauses. If an end user of this widget wants the source code, they have to go back all the way to the manufacturer, rather than any of the middle-men presumably).