Well, I wish Apple advocates would stop strawmanning and posting incorrect generalizing accusations.
I care deeply about privacy. That means I trust the browser sandbox a lot more than native apps. There's obviously a reason sites like Twitter and Reddit try to force their native apps on you as soon as you visit their web page on a phone -- it'll allow them to spy more on you.
> That means I trust the browser sandbox a lot more than native apps
You shouldn't.
The most privacy invading behaviour by far is the cross-site tracking that happens on the web. Where large data companies as well as Facebook/Google are building behavioural profiles with thousands of features and data is being packaged and sold to entities you have no knowledge of.
And all of which is being facilitated by browser fingerprinting courtesy of Google recklessly adopting APIs with little care about privacy.
A native app won't prevent Google or Facebook (or Apple) from tracking you. In my experience, native apps typically always require login, and then fingerprinting is unnecessary.
Avoiding their services, and using an open source and privacy respecting browser with uBlock Origin installed will protect you however.
The latter can be done on all OSes I've used -- except iOS.
They don't care about the web and what is good for end users i.e. more APIs = less privacy.
They simply want to build apps without Apple's fee and controls.