Yes, of course and too many lifeboats might scare the passengers. That's why one can find work in the deck chair arranging industry, attend deck chair arranging conferences, and engage in debates over whether it is best to arrange deck chairs using tabs or spaces.

Yet somehow, users manage to navigate the web despite Apple's app store gatekeepers not setting policy. And really the debate about emulating native exists because of app store policy, not because the native standards are inherently better than what someone might invent left to their own devices...or even that they are necessarily better than the command line.