I'm willing to bet that the events described here will not be a mortal blow to Zoom, whether the event is isolated or only semi-isolated. To make it concrete, their market cap will still be above $10B on Jan 1 2022. I'll put up to $20 on it, to a non-religious charity of your choice. If you want to take the other side of that bet let me know.
The question I'm most interested in is the one where the individual at the top of the thread suggested this would be a mortal blow to Zoom. It won't. Nit picking about exactly how isolated this is does not change how few of Zoom's customers are or will ever be affected.