I find people who agree with me for the wrong reasons to be more problematic than people who simply disagree with me. After writing a lot about why free software is important, I needed to clarify that there are good and bad reasons for supporting it.
You can audit the security of proprietary software quite thoroughly; source code isn’t a necessary or sufficient precondition for a particular software implementation to be considered secure.
This serves as a springboard and a fallacy by omission that closed source is just as workable and trustable. I noticed this with r/PrivacyGuides and GrapheneOS Matrix room moderator Tommy_Tran/B0risGrishenko in this bullshit announcement post and comments regarding Rule 1 (no closed source software):
https://teddit.net/r/PrivacyGuides/comments/siqc69/consideration_on_removing_rule_1/ (Archive: https://archive.is/Jxpmb)
The famous Underhanded C Contest tells us why closed source software is always an inferior proposition.