There will not be any greater benefit from understanding - it is the general condition to achievement. So: you do benefit from it, and you may want to put effort in it. It will have side effects, such as moral behaviour.
No: you are showing difficulties in understanding that your lack of valuing those things has nothing to do with the reply.
Just re-read the statement: you were not told that you would benefit from moral behaviour, you were told that you will benefit from understanding. You then were informed that understanding also has side effects.
