The problem is that this approach is perfectly fine when it comes to us programmers or more technical people, but for "normal" users this approach won't work, simply because they don't know the possibilities an up-to-standards iOS Safari would bring.

There's a saying; "What you don't know can't hurt you", and that can be applied for these users - whom make up the majority of iOS device users - since they don't know what they're missing out on. While you and me on the other hand knows what we're missing out on, both as programmers and users, we at least have the chance to vote with our wallets. I do, perhaps even you do, but as you can clearly see it's still not enough to even make a dent in Apple iOS device sales.