If you are claiming to give lessons, then I am afraid you sold your students short.

You SELECTIVELY shared a CCC paragraph (1783) explaining the principle. 

The bottom line in traditional Catholic teaching is that conscience, even it is erroneous, should be followed. 

CCC 1782  Man has the right to act in conscience and in freedom so as personally to make moral decisions. "He must not be forced to act contrary to his conscience. Nor must he be prevented from acting according to his conscience, especially in religious matters." (DH 3 § 20)