Still they were stubbornly refusing to bring it to their phones, which are their most popular product line by far, until the EU forced their hand.
But I understand your viewpoint and, again, I love USB-C (and my iPhone). My biases are absolutely playing into my viewpoint on this. I just don't think they were dragging their feet due to wanting to make more from MFI/Lightning as some suggested, it was mostly just being slow to change something that would annoy people (and the change did annoy many people, even though I don't think they should have been annoyed).
I tend to view Apple's actions (and those of any company really) first through the lens of their own self-interest. Killing the headphone jack, which was an open standard, benefited wireless headphones. And, unsurprisingly, Apple's proprietary integration with Airpods help make them the best wireless headphone choice.
While I don't wholly disagree that Apple would have eventually switched to USB-C, I doubt they were slow to migrate out of an abundance of caution. Apple is a huge fan of lock-in, and never gives in to open standards easily.
I’m not a huge fan of the EU government making specific demands of specific companies to adopt specific technologies, but this is Wi-Fi and telecom tech has a long history of adoption through legislation. So it’s not at all unprecedented and is probably the lesser evil in this case.
There is quite literally no evidence for this theory and mountains of evidence that USB-C is what they were always going to switch to. They had already switched checks note almost every other device they make to USB-C. The few that weren't USB-C at the launch of the iPhone 15 have been moved since then (specifically keyboard and mouse). I'm not sure if there are any Lightning devices left at this point.
There is: https://www.macrumors.com/2023/02/10/apple-planning-to-limit...
Apple was then told by the EU commission to abandon those plans: https://www-heise-de.translate.goog/news/Ansage-der-EU-Kommi...
A second option would have been to make lightning a data only port that would not charge phones.
In either case, the reactions to “in order to comply with EU regulations, wired charging capability has been removed from iPhones sold in the EU” would have been hilarious.