Ask HN: Why can't we solve the app store monopoly problem?

For the longest time, application distribution has been generally a sport for big companies like Apple and Google. Why hasn't there been enough innovation in terms of creating alternatives despite a healthy improvement of web application distribution like PWAs(Progressive Web Apps). WeChat uses microapps that help users access a lot of other mobile applications. Some interesting innovation might be Dapps inside the Coinbase Wallet or Status IM. What are some reasons it is futile to take on this marketplace.

Most of us here do not want to promote the rhetoric/marketing of DHH but just want to bring attention to important problems that need to be solved.