No, I understood what you meant. What *I* meant was that if they can get here, they've defeated some mighty large challenges, including some that we haven't, and maybe mental health and enlightened self-interest are among those. We can't judge what they would do by what we might do.
...But "for the fun of it" is likely to play a major role anyway, because that's the short definition of sentience. Timo Saloniemi