That's very defeatist. Do you have any concrete reason to think the major providers are lying to every one of their business/API customers about not training or storing the data? The business loss of trust would outweigh any benefits of the data.
(And if they freely lie about such things, I don't know why they would bother taking the PR hit when they announced fable had temporary data retention for their abuse prevention)
(And if they freely lie about such things, I don't know why they would bother taking the PR hit when they announced fable had temporary data retention for their abuse prevention)