It's a phone charging port. It's not that serious. It's better for consumers if we all have the same one for everything, if possible. Unless you can tell me why not?
Imagine this happened a few years ago, and the EU had instead demanded micro-USB. Then we would still be flipping plugs twice, and I wouldn't be able to use my laptop charger to charge my phone. It's not clear to me that USB-C is good enough to be the "final" connector, especially with the mess around USB versions, Thunderbolt, Displayport, etc. Unlike e.g. power sockets, where I am pretty confident that the current design can last another 15 years. (But which is not standard across EU countries!)
I believe the exact wording was that the industry was required to standardize on a connector, which at the time turned out to be micro-usb. Now the industry is shifting to usb-c, which is objectively better.
The current law already includes provisions to switch to a potential superior connector in the future. If the industry comes up with something better, the EU is not going to demand they stick with usb-c forever.
But it didn't, and it may very well be because those people are not as incompetent as betting on making something a standard prematurely. They id it only now.
Be careful with hypotheticals as basis of an argument.
In this case the counterfactual is a stronger argument than you saying "they did it only now" with appeal to authority. Unless there's a well reasoned approach to this policy, we are practically stuck with the current standard until the EU bureaucrats decide everyone needs an upgrade.
I don't really see how this is any worse than the current "do whatever you want regardless of what everyone else is attempting" that manufacturers currently go by.
But as other commenters point out, provisions exist to assist with this.
USB-C only exists because Apple proved to everyone how nice a reversible connector is, and USB caught up years later. Lightning has some other advantages like being thinner and less difficult to break. If Apple caves and moves to USB-C everywhere it’s very unlikely that future innovation in connectors will happen.
To me this is a really good proposal. USB is already the winner here. Apple is making life harder for consumers. To me the real short-sidedness of this is that wired charging might be completely irrelevant by 2024!