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I know. but my point is we always refer to ourselves. we're talking chimps with guns. If you can get around from star to star, you're a bit smarter. I'm not saying that there won't be any bad aliens out there. but I think it's pretty obvious we're here. our tv signals UHF have already travelled to many of our nearest stars. I'd keep away if I was an alien. It would feel a bit like travelling to Planet of the Apes.. which is exactly what Earth is ! I just think they'd have space lasered us by now if they wanted to ! He might be right though.. in which case, forget it.

If aliens manage to balance the resource consumption in their planet they don't need to go spacefaring in order to survive.

I don't think exploring space is even about balancing resources. If you have interstellar crafts, you have all the energy balanced already. Again we seem to be only able to think of others in terms of ourselves. To me, that's a huge and glaringly obvious mistake that only we humans would make. We don't know about how another evolved intelligence might see the universe. possibly in a different way altogether. At best we are probably a curiosity. a primitive technological society on the cusp of either destroying ourselves or about to escape the velocity curve of our own past.