Critical thinking is the most important tool for anyone, PhD or not.
In this noisy world that we find ourselves in today, one MUST cultivate critical thinking skills.
I don't trust phds because they "sound smart". Indeed, true smartness lies in simplifying complex concepts without much loss of information. I know the types of faux intellects you are referring to. Beware of them.
I trust phds more because my prior on their ability to use critical thinking is much higher than a Hollywood dimwit who is paid to express emotions in people.
It is still your job to trust, but verify. It is just easier to verify logically sound arguments or insights.