In fact, MicroUSB was already required in the EU and used by all other manufacturers - and Apple supplied MicroUSB to Lightning adapters. (Remember the times before 2010, when every single device required it's own fancy charger?)
Now we have a newer standard (USB-C) - superior (maybe not mechanically) to Lightning - a standard that will be sufficient for some time to come and is used in all of Apple's more powerful devices (Lightning is reserved for the weaker, smaller devices now). USB-C can drive multiple high resolution displays and supply around 100 Watts of power - enough for powerful notebooks - how much more data or power are we likely to require on a mobile phone in the years to come?
If USB-C is really not sufficient anymore, device-makers are free to implement an additional port - keeping the device backwards compatible with other hardware (chargers, displays, storage, networking, ...) and easy to charge in any place - unless the device is too small for squeezing in a USB-C charging port.
So, where's the problem? (Or is just another way for blaming the EU - which has helped bringing peace, wealth, justice, freedom and civil liberties to European countries like never before?)