Why would it come at the expense of long-term profits? The EU has given a legal mandate to USB-IF, you literally are not legally allowed to use anyone else's connection standards. What "profit loss" could possibly occur under a literal government-mandated monopoly requirement?

Display standards aren't quite there yet but HDMI is effectively a monopoly in the living-room space and most people use them for mass-market (low-end) monitors that are the most common. Effectively it might as well be a mandate, especially when DisplayPort comes with much shorter cable lengths/etc that require equipment reconfiguration.