I think you are mixing "engineering" with responsibility. You could literally take away "engineering" and put in any other word and it wouldn't mean much at all except just saying 'be responsible'.

Yes having more knowledge and accomplishment (experience) in anything in life lets you develop more confidence.

Ethicality is different from responsibility though, I think you conflated the two.

In some traditions, engineering is intertwined with responsibility: https://en.wikipedia.org/wiki/Calling_of_an_Engineer