@Qelix
Maybe because the Goddess isn't supposed to meddle. Doing at most these things is meddling is one way or another. Telling jealous women not to hurt the hero's lover will make her target. (Lightening, seriously, that's just grabbing Demon King's attention and the plan was to keep him away from her. He will know that Goddess is protecting the reincarnations and go get her. He's not going to ignore that. Crucified, again that's a beacon. )
How will that change anything besides making her a bigger target and an obvious one too? Also, the temple people are bad ideas because most of them aren't all good. There a good chance that Lousie is in more danger if she protected by them. The royal family couldn't protect her because that Jun died. No human in the whole Kingdom was to be trusted because they screwed her over.
The Goddess can communicate through mirrors and when they are on a spiritual plane. (Maybe the stature but I don't think Graham ever talked back to her. ) Heck, even those are limited.
Everyone wants the Goddess to protect her better but those actions defeat the purpose since they draw attention. Heck,the Demon King could find her through the heroes.
Now you make a good point about the Goddess recycling her soul so much. I mean why does she have to go through all that over and over again. What the purpose besides letting Jun's soul get screwed by people over and over again. Come on the woman suffered enough. Also, the part that she took a high school girl that knows little to nothing to a new world. Also at less try to talk to her at less once during those lives. ( Maybe that will draw attention to her. Who knows?) Those I freaking understand.
Edited: By the way this before I saw you edit. I just noticed.