> But I haven't seen a convincing argument to ban price discrimination.

The very definition of "price discrimination" is the convincing argument.

    "How much does this candy bar cost?"
    "Well, you social credit profile says you payed $700 for pair of shoes last week so... twelve grand."
    "But the guy in front of me just paid 35 cents for the same candy bar."
    "Well, I mean, *he* is white."

> But where's the argument?

Looking to big pharma for guidance is depressingly hilarious.