[iraldir]

That's explored pretty well in science fiction, but I guess for me an easy reasoning is if it's feasible, then someone will inevitably do it. If so, then you might as well be the one in question, this way - you get fame and glory, even if the results are disatrous (wasn't there a blockbuster recently about the father of the atomic bomb?) - if you intend well and you believe in your own capacity, you might prefer creating your own AI than waiting for someone with a different agenda to do them - just... curiosity? Loneliness for some? - if you believe the AI will discriminate against people who didn't help it, you might want to be on its good side?

I'm spitballing here but surely given the number of people on the planet, you'll find someone with both the skills and the want to try it