因为狩猎活动耗财费物，因而有见识的大臣往往劝谏。

Therefore, some experienced and sensible ministers were always against it.

如果父母有违反道义的、错误的行为就要劝谏，还要坚持，到成功为止；

If parents should engage in wrong conduct that is against moral righteousness we must try to dissuade them, and persist until we succeed;

根据人伦的规定，子女这时的义务和责任就是劝谏父母，还要坚持，直到成功为止。

Yes, according to relationship-defined obligations, the obligations of the offspring in such a case is to dissuade the parents, and to persist until successful.