I don't think that's been true for a long time. Their main market is commercial users now - reference what happened with COVID shortages and RPi prioritizing nearly all of their capacity to commercial users, leaving tinkerers with little to no stock.
I think there's actually a lot of commercial use of the regular boards as well. Plenty of products for which a Pi is sufficiently capable and for which they can use something off-the-shelf rather than developing a custom PCB.
Except linked in this exact discussion is a thread where the person is asking RPi for remedy instead because the seller has been unable to assist (i.e. has run off with their money).
That RAM is not fiction, it was working before they updated and worked again when they removed the update. It's failing verification, not failing to function.