To be frank, this makes the website extremely deceptive. That isn't "Private by design" - it's the opposite. You choose to prioritize the better AI assistant _over_ privacy.
The claim that "Your data is never recorded" may even be legally fraudulent. I'm glad that you don't record the data, but OpenAI does - making the claim as written a lie.
I understand why you made these decisions, but the website should not contain borderline false advertising.