I'm not suggesting a Disney utopian fantasy. I'm just suggesting that in a very pragmatic way, we can ask them questions and get meaningful answers, or ask them to do things for us.

What's going on down the the sea over there? Would you mind pulling that thing from here to there?

Or whatever - I don't know what we'll figure out to do, but certainly something.

As far as them being mad at us, I doubt they will be, but I'd be interested to get their perspective - if they have one.

I do not believe we can expect anything resembling a human level of intelligence to be discovered.