These comments are good for any similar commercial offering, not necessarily specific to Zoom but including Zoom. I would not do anything secret over Zoom or any other similar platform. You cannot be certain that there are not going to be adversaries listening or intercepting, or even changing packets and communications, because you don't know who is the third party contractor who may have access either overtly or covertly to something that widespread. It is just not trustworthy for anything of a high security nature.
On June 11th, 2020. See this statement in context.