>> people will figure that out and adapt for themselves

>No they won't. People on HN will. Not the average person.

Yes they will, Apple has made it very easy to see.

To check iOS app power usage, go to Settings > Battery, where you'll see a breakdown of battery consumption by app for the last 24 hours or 10 days, showing usage time and background activity, allowing you to identify power-hungry apps and manage settings like Background App Refresh to improve battery life.

So yeah, it's easy to see which app is taking the most power, and users can do this easily, unless you think Apple's UX is so bad that users won't know how to read it?

>The problem is, arbitrary code execution vastly expands the risks. Your "should" is doing all the work there.

If that's a problem for web browsers, then it's a problem for every single app in the app store. There's nothing really unique about a web browser app that makes it more risky than any other app. Javascript is already very much sandboxed. And there have been plenty of exploits that already target Safari. So saying other browsers are the problem is like blaming the victim (of Apple's anti-competitive practices).

>Huh? Apple follows web standards. Why the heck should it make Safari available on Android and Windows? Safari isn't a standard, web standards are.

If web standards are standards, then let other web browsers on iOS.

The real reason Apple disallows other browser engines on Safari is so they can force developers to create native apps where they can get a cut of any purchase made through the app. The problems with Apple's anti-competitive practices have been spelled out in the DOJ lawsuit against them:

https://www.justice.gov/archives/opa/media/1344546/dl?inline