Hmm, I don't really agree that there is nothing new about humans and earth to explore. What we know about this world and humans is only a fragment, we might have seen a little consistently but let's not think that's all that there is.
I wouldn't hesitate to help another fellow from another realm too even though it's risky because we don't know what his/her agenda is, either way, nothing is wrong with giving a helping hand.
For going to their realm one day, hmm, unless I am assured that all is going to be well if not, I am not going anywhere.🤣