Well…all points taken.
Because my son chose to take ChemE as a major, then I should not intervene. The main reason being is not the parent should not intervene as a principle but rather, it’s because he chose a good major.
Some parents say if the child chose music or humanities as a major, they might intervene.
Some parents say they will not intervene at all even if the child chose to take religious study or music or humanities.
For my specific case, I won’t influence my son to change his major unless in the middle of his studies, I see his grades suffering.