The q is very much welcomed. I think, the first three points i.e.
Follow the industry…..,
and Learn from your….. are co-related to each other. When any person takes certification he/she must consider the current industry scenario. Because his/her employment depends according to his /her working capacity, knowledge on the same area (which may earns from doing a certification) and so on.
Today market is so competitive that certification is not only considerable. Any esteemed company / industry looks what potential the employee has and how he / she can use in a cost effective way regarding working area.
For this reason of competitive market, I think seniors are not interested to teach or guide to their juniors in a proper way. You may extract very little of knowledge from them, but they never deliver the whole to any juniors. This is the trend, I have experienced.
Of course, certification has solid value and (global obviously) current employers want that their employees are very well educated and have global certification on their working area.
And the last point, I am focusing, School study….. so my point of view, in our professional career, school study ends when any person enters into his/her professional life. Obviously, in school life he/she must gets a strong high quality academic degree and has consistency of track good record.
This article is written entirely what my thoughts and my experience !
Good Luck !