I don’t think anyone is objecting to the motives of the legislation, but rather that it’s unconventional for governments to directly stipulate a technology. Typically they set some parameters that their subjects must comply with. For example, they usually say something like “cars may not emit more than X PPM of carbon monoxide per liter of fuel” rather than “cars shall use technology Y”. It’s not that speculating a technology is outside of the government’s remit, but rather that it’s typically a bad way to make policy (politicians aren’t technologists, governments move slowly, etc).
In the particular case of USB-C, it’s a bit puzzling since it’s not actually an interoperable standard. For example, while the charger shape is the same, I can’t charge my laptop with my phone charger. Maybe the legislation accounts for this, but it’s a bit of a disappointing standard to cement.
> “legislation isn’t set in stone”
I suspect it’s an order of magnitude more difficult to change that legislation than it would be for the market to bring another standard. You might say, “if the Americans have some new fangled charger, the Europeans might demand change from their government”, but it’s pretty unlikely that anyone will invest on a new charger that they won’t be able to sell in Europe. For example, most phone manufacturers are unlikely to make a Euro-only variant, but will rather make a USB-C phone for the whole world, much like how Americans have to suffer through GDPR cookie notifications even though GDPR doesn’t apply to us.
Lastly, is interoperability even a problem? I remember the bad old days before USB and interoperability didn’t really exist because every adapter was proprietary and expensive, but I can’t remember the last time I had an issue. Similarly, are these chargers a major source of e-waste? And how much of that is this legislation going to change? Cords will still wear our and be thrown away whether they are USB-C or Thunderbolt.