No, it does not overlook that "major use case". You're confused between wanting something to work in a specific way, and whether things actually work that way. If there's a "#1 most common fallacious reasoning strategy" employed by advocates of browser crypto, it's that one.
Why make assumptions on my motivation? And why assume I wouldn't know what subjectivism is? I think your comment could have been way more useful if you replied to the argument instead.