You were not asking about dynamic pricing. You were asking why you weren't able to see the reason that consumers don't always find & choose the cheapest option. The person you were responding to was explaining the unethical realities of food retailers. There's no reason why these would disappear with dynamic pricing.
No, the entire conversation is about a change toward dynamic pricing. My comment about pricing is that dynamic pricing doesn't change the competitive dynamic between retailers. You are chiming in and saying "well there are other competitive/noncompetitive dynamics at play," which I agree with and never disputed and am not talking about.