Wowwwww, you are accepting what apple forced to happen as the only way things could be.

Safari is by farrrr worse than Firefox and the only reason firefox share is so low is because of (largely Apple's) anti-competitive monopolistic practices that specifically are about increasing app store revenue. Apple is a huge anti-open-web force like no other company has been before. Even Google, who is horrifically fucking the ecosystem up, lets you install any browser you want, and even though they are a controlling asshole force on the w3c, they don't completely flout or oppose standards like apple does.

web devs also hate it but requiring they put in the effort to support Safari is what an open web is all about.

I haven't read a statement this wrong in a while. Fuck no it isn't. Supporting other browsers, mobile or desktop, is never as difficult as supporting Safari is. There are two reasons for this, both rooted in apple being a blight on the history of the web.

One is that they literally make a conscious choice to make the web worse. Their worst nightmare is for users to be able to replace app store apps with web apps they make no money from, so they intentionally never have adopted most pwa features. They also choose to implement new standards years after everyone else for the same reason. Gotta keep users in the mindset that the web is lacking and not a great solution for anything an app can do. Even if they have to strongarm and brainwash their users to keep that attitude popular.

The other reason would be forgivable, if they weren't a TRILLION DOLLAR COMPANY: incompetence. I don't believe Safari is so buggy by choice. They just aren't great at making a web browser. People love to crow that safari is so fast and light on battery, but only web developers are uniquely qualified to understand how much of a mess it is. For example, try supporting a video player on Safari iOS. Absolute nightmare. Nothing works completely as expected. It is a dumpster fire of bugs.

What the open web is all about is creating web browsers that consistently are all interoperable with websites in the same way. But somehow you've shifted that burden to web devs, saying it's good and necessary for us to toy for weeks with sketchy workarounds for Safari that are not needed by Firefox or chrome. Firefox demonstrates that you don't need a trillion dollars to make a web browser that isn't full on garbage and conforms to standards. You just need a team of smart people and literally just to care about the web vs care about keeping it worse.

Even if apple wanted to care about the web, their business model requires them not to. So they will continue to make the web worse until the EU drags them kicking and screaming toward a better business model. And they'll fight it for years. To spin all of this as apple being the last bastion for web freedom is absolutely cult-lke apologia and you should check yourself.