You can trace the big players
If Google & Apple & friends refused to take a rake and opened distribution, then I'd agree, net neutrality etc, not their problem
But they own so much, and so deep into the pipeline, and explain their fees to courts because "security"... and then don't do investigations. They employ some of the best security analysts in the world and have $10-30B/yr revenue tied to just the app store fees, so they very much can take a big bite out of this if they wanted.
I'm completely with you, they could do these things if they wanted to. They have the money. They have the manpower. It is just a matter of priority. And we need to be honest, they're spending larger amounts on slop than actual fixes or even making their products better (for the user).
“Priorities” is far too soft a term in this context. These are anti-priorities: not just things they choose not to work on, but things they’ll spend big money to prevent, up to and including bribing, uh I mean lobbying, lawmakers.