I agree with @sveinhal that the invective is not appropriate, but just to be clear: there's no 'punishment' meted out for making off-topic posts other than possibly being redirected to the Apple Developer Forums and possibly having your post de-listed.
A 'SwiftUI question' is one which does not hinge on any particular feature of the Swift language other than the fact that SwiftUI happens to be written in Swift. A question about "why am I getting this compiler error in my SwiftUI view?" is likely to be on-topic (even if the answer involves details about SwiftUI APIs) because it's a question about the language that could have arisen from an entirely different framework. OTOH, a question about "why isn't this view updating when my property changes?" is likely on the other side of the line, in that the answer probably involves a discussion about how SwiftUI works.
The line can often be blurry, and especially for less experienced users it's not always going to be possible to determine before asking whether a given question is a SwiftUI question or a Swift question. If someone can't tell if they have a Swift question or a SwiftUI question, they should feel free to post here and let folks with more experience answer their question and/or redirect them to the correct forum as appropriate.