Well, if we’re talking about people with an education in general, and not just those who work in the industry, then I would listen to them a little more. The key word is “a little.” Simply because if a person played the violin at some point, they can better deconstruct music into its components and so on.
But I wouldn’t automatically trust the opinions of those who work in the industry or critics. Because when your ear is jaded, it’s not a given that they’ll have anything worthwhile to say.
Although, to give you an example, I know a music teacher whose opinion I would definitely pay attention to. Simply because, in a casual conversation, this person once said, “I don’t think that ‘pop music’ is bad. Often, popular songs have a perfectly good composition.” That was enough to earn their credibility…
But in any case, authorities are authorities, and even if they exist, my own opinion still comes first.