Also, I feel part of your idea would imply Rey’s mother loved her, which I feel does undermine her TLJ arc but not as much as the idea of both parents caring for her in the actual TRoS.
That’s a very good point. That way Rey can still be angry at Palpatine for killing her parents, but at the same time she realizes that they willingly dumped her for their own selfish reasons. Although, that did save her life in the end.
It also gives Rey’s dad an actual character arc.