Read through the Wiz MSA [0] at section 6 which discusses “Customer Data” and among other things specifically asks Customer not to send HIPAA data (perhaps to sidestep the issue you just raised) and concludes with this:

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Customer hereby grants to Wiz a non-exclusive, worldwide, royalty-free right to use Customer Data to provide the Services and perform its obligations under this Agreement.

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Or if reading terse legal documents isn’t your thing, go ahead and just read through Wiz’s own blog post about how their scanner works, which confirms they have full, direct access to customer EBS volume snapshots in the default “full SaaS” deployment model. [1]

Your point that due diligence would have taken issue with this might not be grounded in Google’s reality.

0: https://wiz.pactsafe.io/legal#wiz-subscription-agreement

1: https://www.wiz.io/blog/the-wiz-approach-to-agentless-scanni...