Also, what we call "mobile" is actually just 2 nice walled gardens with doors called "App Store" and "Play Store".
That's at least another reason why the web is not pervasive on mobile: Apple and Google are quite happy that it's not that way because they can monetize their platforms with far more control than through the browser.
The article references app stores pointing out that they reduced user friction in payments and subscriptions around apps. Of course, under the guise of user experience you can focus your development efforts on native tool chains and not invest in the mobile browser experience.