The biggest flaw is relying on your ears, that are connected to a very bias brain. The point is your brain is flawed and easily fooled. It's a human weakness. It's a reality that can NOT be trusted to make such dogmatic claims.
Wait, if your brain is flawed and easily fooled, how can I trust your claim that my brain is flawed and easily fooled? Is your brain trying to trick me into thinking my brain is tricking me? My ears are ringing just thinking about it!
It may be true that all audiophiles are fools in believing that the next upgrade will be the last. But to go along with your dogma of not trusting oneself...typically, after cleaning my vinyl, I give myself a light concussion to reset the bias. It's only after the needle hits the record that I can hear the power cable.
Not to talk too much about myself, but once I am fooled, I am twice as shy about it the next time I am fooled. And for the record, I won't get fooled again!

