Well, that is the crux of the matter: the rules are not written correctly because they allow iSH to be inconsistently judged if you take "a strict interpretation"; there should not
be a strict interpretation; it should just be "this app is reasonable" and "this app is not" and not "hey this looks like it's running code…does that make it a security risk?" which reviewers are not equipped to answer.
When we made the appeal for iSH we correctly surmised that the point of the rule that was cited was to prevent apps from bypassing App Store review, which iSH does not do in the slightest. Taken from the real perspective from which the app should have been judged, iSH is not at the boundary at all; instead it's the apps that do things like undisclosed A/B testing and feature flags to hide things from review. So what happens is developers like us who are actually clearly within the rules as they are meant to be applied get caught in limbo at the whim of reviewers who misunderstand the guidelines because they aren't written as they are supposed to be enforced.