In 2024, computer software generated around $373b in revenue while mobile apps generated around $522b. Given that smartphone usage is significantly higher worldwide than computer usage (around 2 to 1 ratio), the stats do not really support your thesis that locking down software access to the whims of a monopoly hegemon results in a massive financial boon to application developers. Even if it did, it still would not justify the harm to the end user entailed, but it also just doesn't do what you say it does to begin with.

Incidentally, while looking this up, I discovered that 2/3rds of that $522b in app revenue comes from in-app advertisements. And here somebody was trying to mock Windows for being adware friendly circa 2005. Good lord.