[AmericanChopper]

Any company IT department's power to ban something is inversely related to how much it's users want to use it. Also, the videoconference provider stealing company secrets it not part of most companies threat model. Teams and Slack are incredibly popular corporate tools, and neither of them offer this feature. WebEx is the only reasonably popular tool I can think of that supports it, and any security department that cared strongly about E2EE, would be asking questions like "do you perform key escrow" if they were thinking of migrating off something like that.

[baskire]

Why isn’t it? I highly suspect the CCP stole trade secrets with zoom.

[AmericanChopper]

Because in order to operate a business (or any organization), you have to at some point decide on a group of service providers and other 3rd parties that you trust. For most organizations, trusting a major videoconferencing vendor is going to be within their risk tolerance. For some organizations (or for some use-cases within organizations) this wouldn't be acceptable (or perhaps trusting Zoom wouldn't be acceptable, where a different vendor might be), but at this point you're starting to stray outside of Zoom's target market and into a set of more specialized requirements.

Defending against sophisticated state-level actors goes even further beyond the requirements of most businesses. Unless you had a specific reason to believe that you were a target of such actors (dealing with national security, or matters of significant national strategic importance), you couldn't justify investing much resource into such defensive measures.

[BlueTemplar]

Does it really take that much for a company to be an interesting target for industrial espionage ?