Earlier quoted context omitted.
My guess would be that it's policy-enforced and what Apple really has problems with is not browsers as a concept (dynamically loading and rendering data) but rather the execution engine that websites usually use (JavaScript) and seeing that as a too-large-to-review area where they want to avoid having vulnerabilities in applications published on App Store. Or it's a anti-competitive move disguised as a "avoid vulnera…
Apple uses no Turing complete policy. So you also can't bundle a python or ruby interpreter in iOS. Its still anti-competitive but in a different area which is language and api. They are basically trying to push devs to use their native OS apis. PWA are also screwed up in Safari for a reason.
You can if it’s for educational purposes.