How does the platform even allow a single tap on an ad to install an app? Edit: Discussed somewhat here https://www.benedelman.org/applovin-permissions/ . Seems like it's abetted by garbage from the carrier. Something for iOS to look forward to?
You neglected to mention Google's Android. It's business model that maximizes for reach over everything else is the root cause.
One is not obviously better than the other, though I'll grant that Apple has managed to get their users to a place where being subjected to them has become a point of pride, which is impressive.