Do you own a business? Perhaps have some closed source software product? Many state actors would happily lift it from your inbox and pass it to some local startups.

I think most people who either own or work at businesses hopefully would be smart/careful enough to not take this risk (for business purposes I personally would only use open-source software whenever possible, and at least try and encrypt sensitive emails or just use something with E2E like Whatsapp), but people using internet/email for non-commercial purposes (i.e. the majority of users) would probably not care what state actors did.

Might be a bit far-fetched, but an organisation that wanted Chinese companies to ultimately succeed might take and use information you are privy to at a medium to large, competing American (for example) company.

You? Maybe not, I don't know much about you. But I would think out of a few million US users, they're able to turn up some useful tidbits.

Particularly as people use this to browse private repositories, corporate intranets, etc.

they are more likely steal your credit card data and vacuum your bank account due to insecurity of Chinese or Russian apps compared to western apps