When will the EU ban HDMI connections to monitors or force Apple to remove them from MacBooks? Why are dSLR cameras allowed to continue to use micro USB and SD cards when they could just use USB-C so we don't have to buy dongles and adapters?
The argument that Apple only provides one physical port (they also provide Magsafe and allow other wireless charging options) isn't sufficient with respect to your discussion point about market-wide standards. This really looks to me like the EU is just saying "we don't like lightning chargers and since nobody is going to defend it except Apple we'll ban it" while they also let plenty of other "standards" run amok in the market.
FWIW I much prefer USB-C and I want my next iPhone to include it (along with any other devices), but I really struggle with the logic of the decision to force it here.