Ehh, I understand your point in general, but I think it's significantly more nuanced than that. Take the car mechanic. His incentives don't completely align wi

Ehh, I understand your point in general, but I think it's significantly more nuanced than that. Take the car mechanic. His incentives don't completely align with yours. Taking a benign example, his goals are to keep your car in good condition and to make money. Your goals are to keep your car in good condition and to save money. Thus, the car mechanic might err on the side of caution and suggest you replace your car brakes every 30 thousand miles, while you (assuming you knew all the relevant information) would only replace the brakes every 50 thousand miles. In the absence of "strong evidence and reasoning", you may still reasonably decide that you don't trust the mechanic.