What are you talking about? Both Microsoft and Apple have had great success developing macOS and Windows while allowing third party developers to develop and distribute apps without an additional tax. There's clearly room in the market for operating systems that don't sell personal data and aren't artificially restrictive to generate more revenue. The fact that Apple cut the tax in half for small companies just shows how disconnected the revenue from the App Store is from the cost of running it.
By all means, keep overpaying for Spotify on the App Store so Apple can collect their 30% each month, but don't force me to. Customers already pay to use a licensed copy of iOS on supported hardware and governments have every right to protect the customer from perpetually getting screwed by Apple. At the very least, we shouldn't allow Apple to limit free speech so that developers can't mention a way for their users to save money.