I don’t understand this logic.
The accuracy of the teachers’ statements, under certain circumstances, throughout time, on certain subjects, has never been based on the teachers’ personal morality. You have said that their actions and inactions are a form of Magisterium. Well, no, they aren’t. Catholicism does not regard the discrete ethical (or unethical) decisions of individual hierarchs as magisterial, and moreover never has.
if what’s being taught can be understood despite the immoral actions of the teachers based upon their own understanding of what they are teaching then what is the point of the teachers?
Let’s take this apart into IF and THEN.
Broken down into just an IF and THEN, this statement is:
1)IF Teachers’ Statement of “X” can be understood despite teachers’ Y
2)THEN you do not need teachers to teach X.
Actually, if the first premise were true, that would be a pretty strong argument FOR teachers, not against them. We can all see that 2 does not follow from 1.
As for this:
we must look to what they teach not through action but through words and ideas which cannot be understood except through the teachers because the rest are merely students.
The Gospels make an argument that is worth our attention: (Mt 23:2; Jn11:51).
The leadership of the priesthood, which Jesus would transform, even in the Old Covenant, behaved wickedly, yet had teaching authority. Ta dah!
And the above quotation from your post is not logical. Let’s break it down to IF and THEN
1)IF we must look to teachers’ actual teachings to learn from the teacher
2)THEN we must understand those teachings through teachers’ other teachings
Umm, I guess? But at a certain point, the individual, the student, is the one who actually reads and comprehends the teaching. This is not an issue, and is indeed how teaching works with literally everyone of any authority on the earth.