Monopolies become entrenched because of network effect. Phone companies had the same problem until the government stepped in.
Web standards are great. And the web is really something special. No one owns the web. I can publish my own website with a ton of different vendors offering hosting. There's a power law distribution of provider success but it's still a fair game.
App publishing is owned by two companies. Messaging is siloed. Discoverability is pay to play. There is no townsquare not owned.
The way to solve these problems is forcing platforms over a certain size to open their protocols. So We can make on own messaging client that communicates with the gatekeepers. We can offer, without the app stores, our software to their users in the same way that the gatekeepers allow.
Monopolies kill markets. Allowing a fair market on network effect platforms would make the categories competitive. Smaller businesses could compete. The margins would lower for the gatekeepers. The consumers would benefit from lower prices and more innovation.
Most of all, we'd finally be able to reverse the trend of cynical software - 'enshitification' - that comes when a monopoly understands that they no longer need to compete.