Companies have already shifting from not using customer data to giving them an option to opt out ex:

“How can I control whether my data is used for model training?

If you are logged into Copilot with a Microsoft Account or other third-party authentication, you can control whether your conversations are used for training the generative AI models used in Copilot. Opting out will exclude your past, present, and future conversations from being used for training these AI models, unless you choose to opt back in. If you opt out, that change will be reflected throughout our systems within 30 days.” https://support.microsoft.com/en-us/topic/privacy-faq-for-mi...

At this point suggesting it has never and will her happen is wildly optimistic.