Something I see a lot is bright students taking easy courses for the marks. And these students are not lazy, don’t have many other time commitments, are general

Something I see a lot is bright students taking easy courses for the marks. And these students are not lazy, don’t have many other time commitments, are generally very pleasant and engaging to talk to, and ace the material. But when I suggest that they should be taking harder or more interesting subjects, they respond with something about marks.