I actually had to read this whole thing twice because the first time I thought they genuinely wrote all that without even suggesting a single FOSS alternative to zoom. They don't actually suggest one so much as effervescently mention one (BigBlueButton) near the end without describing it at all or even indicating that, yes, this is the what they want people to drop Zoom for. No wonder there's no author listed, this is one of the worst attempts at effective communication and persuasion I've ever seen. You can't sit there and say Zoom sucks without telling us why the alternative is better, especially when 95% of peoples' experience in the matter is that Zoom is an order of magnitude better than everything else they've tried.
We in the FOSS community need to stop being worse than our stereotypes.