Earlier quoted context omitted.
My problem with this is Zoom's misleading claims. If Zoom can't implement end-to-end encryption, it shouldn't claim that it does.
I think they would claim the terminology is ambiguous. If the connection is encrypted between all clients and the central server, a business person might say that's end-to-end, ie all traffic in flight. The real test is peer-to-peer or not.
I think that's the problem being described. That is not end-to-end encrypted. It is, however, encrypted.
Zoom simply needs to drop the "end-to-end" part.