I've found that being considered a 'competent engineer' merely means 'never too arrogant to learn'.

I didn't know half of the stuff in grandparents' post.

I was attempting to confirm that these are all points are important. Being too arrogant to learn and being in incompetent are two entirely different things.

Sorry, I misunderstood. To me, your response came across as a "well, duh!".

No problem; as I read it back to myself I can see how it came across that way.