As it turns out, it’s impossible to remove a user’s data from a trained A.I. model. Deleting the model entirely is also difficult—and there’s little regulation to enforce either option.
I'm rather curious to see how the EU's privacy laws are going to handle this.
(Original article is from Fortune, but Yahoo Finance doesn't have a paywall)
You're right, this is a way to solve this issue. It's just not economically feasible to retrain your model from scratch every time. It takes a lot of money to do it and they will push back.