@fjjrg
Foremost, I apologise for the late reply, my friend!
Most people don't follow the guidelines you cited, and that's why people might become the jack of all but master of none!

From my perspective, we all are learners and can learn each day if we wish to acquire knowledge but the thing is we don't consider ourselves most of the time students rather we love to show our minds;
and from here the problem occurs!

We all are humans carrying baggage full of mistakes, some identity, but most fail to recognise them!

Being a teacher, you are following the correct path that somehow keeps you grounded and provides you the opportunity to learn something new, and that applies to all of us.

Thank you for your valuable presence and comment! Stay healthy; I believe now your high blood pressure is under control!