'Open Systems' predate 'Open Source' by a decade.
> "open source" marketed as trumping "open system".
Common use and understanding of the use "open" evolved decades ago.
Your comment also tries to side step the issue at heart people are annoyed and frustrated by. The founding principles of the OpenAI foundation laid out exactly what that usage of "Open" meant for their organization and they have since backtracked on their own principles.
> Your comment also tries to side step the issue ..
We disagree. Narrowly directed and addressing the "issue", in fact.