I think this is one of the central discussions in Book 3; Emily would agree with you (see day 3 of book 3), MC would disagree.But all this, is exactly what I mean though.
When they get mom and dad's memories and experiences, there are bound to be conflicting opinions/memories, that would directly go against their current beliefs/wants/needs.
They're both valid ways to view things, and the interaction of the two inspired Morningstar