I am invested in a platform where a malicious foreign entity (EU) is trying to change its fundamentals out of pure spite. If Apple also gives in, There will be no walled garden ecosystem and I might be forced to cease using a smartphone. EU is literally stealing the values and features (the walled garden ecosystem that is tightly vetted) so they are complicit in theft. A "third party app store" or a "sideloading" enjoyer can always buy an android, but if EU forces Apple to open up too, it's over for people who do not want these features or who know the malicious outcomes this opening up can bring (look at the vast world of Android viruses..)
EU is forcing Apple to give up on platform security, and putting millions of families (and kids) that uses iOS in danger because
1) Little Hans from deutschland wants to play fortnite or install some obscure stuff on their iPhones,
2) EU knowing that this walled garden ecosystem is fundamental to Apple's mobile platforms, forces Apple to pay fines periodically becuase they know Apple can't easily change stuff.
This is theft at it's finest. Theft from me and millions of people who buy Apple devices BECAUSE of their secure walled garden platform, and theft from Apple, inhibiting them from investing more in r&d, stiffling innovation out of PURE SPITE.
How about you spend all that energy in your own mobile platform that would have whatever rules and regulations you want, instead of coercing a company and extorting them out of cash. You don't even have to build from the start, either take AOSP or any other linux distro and build on top of it.