Full disclosure: I haven't read the linked article and am not defending or endorsing it here, just trying to correct a misconception about engineers. I have a BS and MS in engineering, and am almost done a PhD in engineering, where I have basically conducted applied scientific research. I am friends with quite a few physicists and have heard variations of your argument from them many times. When they ask why I didn't get a degree in physics, my answer is easy: "Physics" is more accurately "modern physics". Consequently, fluid dynamics (my area) is rarely studied in physics departments. Typically one gets a degree in aerospace or mechanical engineering to become a fluid "physicist".
Also, I haven't seen any clear data showing that engineers are more prone to unqualified statements that than non-engineers. I think there is something to this but I would attribute it to engineers (by title) seeming more conservative and religious than scientists, and they are willing to challenge the status-quo here. The problem in my view is not engineers being less qualified to do and understand science.