You're at least partially correct since they require a MFI approved cable to reach USB 3 speeds. Otherwise you're limited to USB 2 speeds.
Because I think Alex Agius Saliba will have an unkind word to Apple if they try to pull that shit.
However, it does look like Apple may have walked this back post-rumor. I genuinely hope they did. We'll find out soon enough.
Whee.
The goal of the EU legislation is to avoid people needing special chargers and cables per device.