There's a major free-market failure because there's no negotiation over the agreement. There's no representative for consumers pushing back. So that representative needs to be the government.
This is the entire reason for consumer protection laws.
It is great that the government protects consumers. Otherwise, everyone would need to spend hours researching everything before making a rare purchase.
> Otherwise, everyone would need to spend hours researching everything before making a rare purchase
On this issue specifically, these projectors seem to be in the tens (possibly hundreds) of thousands of dollars so some research and due diligence doesn't seem that far fetched.
Indeed, which is why people may choose to band together in a bigger bargaining block to improve their position and possibly even achieve greater power than the other party. For example, they could choose to form a single block that represents the citizens of an entire country.