i see your point, but just to be clear VW hid emissions software from ~regulators~, not from customers, and we know this because they've admitted such, company fined heavily and top engineers+managers were implicated and indictedWe can look at everything in this manner... it's called playing the devil's advocate.
For example, how do we know that VW wasn't the one who did the scandal, but some bad apples at their engineering department? If VW truly wanted to hide their emissions, why didn't they keep hiding it from customers? That proves their innocence! See how this works?
... i used VW as an example of how a company had the "will" to cheat, and found a way