Because a government full of people who know nothing about technology must be the right answer. What other areas of the iPhone should the government force Apple to standardize? FaceTime? AirDrop? iOS itself?
Note that as consumer, I can't vote with my money for standardization. I can only vote for one of the proprietary solutions. So if 70% of consumers stick to one option, and 30% stick to the other option (because of other product features), standardization will never happen through market forces, even if 100% of the consumers would want it.
It gets even worse when more than 2 options are on the market, and vendors gain an advantage by locking customers in to their proprietary option.
It’s perfectly possible to have sensible hardware standards where doing so will not impede the market without insisting that all software be also standardised.
For the record I think it would be useful for Apple to have the built in Facetime client be able to communicate with other phone platforms. I don’t think Apple should be compelled to offer that currently.
The Android market is just like the PC market of old - a slow moving race to the bottom. Even today, most low end Android phones are still using Micro USB.
Again, to not be misunderstood, I'm not sure if charger standardization is indeed overwhelmingly beneficial for everyone. That is what I believe we should discuss here.