The important point being, with Google, Notion, Slack, Confluence, etc. your company has an actual contract with the vendor, properly signed, with provisions about data handling that your company (and unlike you as an individual) can effectively enforce. There's an actual relationship created here, with benefits and losses flowing both ways.

The Terms of Service? They're worth less than it costs to print them out.

Case in point: right now, Microsoft is repackaging OpenAI models on their Azure platform and raking it in - the main value proposition here is literally just that it's "OpenAI, but with proper contract and an SLA". But companies happily pay up, because that's what makes the difference between "reliable and safe to use at work" vs. "violating internal and external data safety standards, and in some cases plain up illegal".