It is about PPRuNe. It is about learning from mistakes, own or mistakes committed by others.
Yes, you are absolutely right.
But to achieve this goal we have to know, first of all,
what kind of mistake the pilot made,
and then, what was the reason, he made such mistake.
So the first mistake, as you properly stated, and we know for sure,
was flying below minima.
Why he did it? I think, IMHO, the pressure, direct or indirect was the reason.
The second mistake, already in approach, he was flying wrong glide path.
Why did he do it? At the moment we can only speculate.
Taking into consideration, that, for political reasons, the true reason
might be never revealed, we are left with our "educated guesses"
or, if you prefer to call it this way, useless speculations.
Whatever the name, the educational value is undisputed,
at least IMHO.