Did you completely misunderstand the text segment you quoted? It doesn't say that the software itself is open-source/free software, it's just talking about the data it produces/maintains/uses, so your comment seems to be way offside.
What is your point? I've moved my obsidian notes to vscode and back without any issues. Is closed source software somehow incapable of having true statements?
It's by default tricking you into believing you should trust it, so yes closed source is incapable of having true statements until proven wrong (source: you can't prove it by nature)
Closer: "I am incapable of reasoning, except in broad generalities".
Having an open and simple file format that is easily imported/exported is all many of us want from software. We are actually perfectly OK with paying people for work. Separating data freedom from access to source code is a perfectly meaningful thing to do, even if you personally don't like it.
I assure you that I'm personally good with the separation, which makes sense.
I made a remark about a remark, and nothing more.
Speaking of personal, I don't mind attacks; do go on. Well, not that I want to encourage it here, where it is not allowed, but you can PM them to me, if you have more.
... says a brochure page for proprietary software.