It shouldn't be possible to plug my power supply into an earth-less outlet, since it has that prong that will only fit earthed sockets.
So imagine if some accident occurs, who is liable ? Me because the power supply is defective, or the customer because his electrical installation isn't right ?
From your profile you're in France where they have no Earth prong on the plug side. As of Europe and many other places, unearthed sockets (Type C) accept earthed Schuko plugs. Also many older houses have earthed sockets installed but no actual earth connection. Not to say user can bring the device to other country and replace the cable.
The only problem is if earthed sockets are installed but not connected. Replacing the cable won't allow them to get rid of earth (IEC 3-pong, it always comes with an earthed plug on the other end, and these wont' fit into Type-C outlets, they really only fit into earthed ones like type F or type E).
You could potentially open them all up and rectify the fault, by ensuring the earth wire is in the cut-out and is properly protected from abrasion, but is it worth your time?
Abrasion cannot happen really if it's inside the cut-out. Wire is fairly rigid and the heatsink is thick.
I checked for bulges but I can't see anything and I can press on the faulty unit without problems. I think the wire got squeezed when the "press" assemble the units. Once it's assembled, there is some tolerance between the case height and the heatsink (heatsink = 23mm high, while i measured the inside case at 23.5mm, just enough place for the copper wire once the insulation is cut)