Knowing that they take it is only half the picture. What’s important is the things they are doing with it.
https://www.androidcentral.com/apps-software/why-you-should-care-about-what-companies-are-doing-with-your-clicks?rand=7
No, Google isn't using your Gmail data to train AI models, but that doesn't mean you shouldn't be careful about the kind of data you share with companies