On iOS everyone is still stuck on WebKit.
Also EU seems to be bringing light at the end of the tunnel on this one. Like with alternate stores, alternate NFC payment, alternate standard apps, etc. EU is seriously amazing on this, in my view.
Considering that this platform exists since what, over 10 years, I think the EU gave them a fair amount of time to get their shit together. By now, it's clear they won't or do not want to, hence EU stepping in.
I hate over-regulation, especially made by people that have no clue about the market they are regulating, but as you said, I think in this case it's more than warranted.
Normally I don't like governments stepping in for this sort of thing but good fucking God Apple has been such a poor steward of their platform that it's actually creating problems even for people who don't use it. This is one of those situations where it really is necessary.