The current model is 1:1 for patient:race, data entered by the patient. You are proposing a 1:n model with data entered by each practitioner. That is a different model.

And again, you haven't walked through the practical consequences of making this change and how it will improve fairness enough to be worth the cost of implementation. If you're serious about this, please do that. Otherwise it looks to me like you're just bikeshedding, and I don't have time for that today.