That would be pretty accurate assumption 40 years ago. But nowadays, there's a lovely governing body called OMVIC which oversees the operations of all new and used car dealerships. Exclusively in Ontario and Alberta of course. But by their standards, it's literally breach of code of ethics that every dealership is bound to thus giving all consumers recourse if they, OMVIC sees fit.

I'm not saying you're wrong about dealers bullshitting or plain lying. It's obviously unavoidable. Just need to take it with a grain of salt so to speak.