RE: "I AM DONNA - and I'm the hammer"
Nothing can be human (thus intelligent) other than a human himself.
People from the past also believed the Earth was the center of the universe, and then that the Earth was flat...
By saying humans are the only ones capable of being intelligent, you are indirectly saying you don't believe in the possible existence of advanced extraterrestrials some place in the universe for example?
With AI it is just beginning, and something like Siri was unthinkable a few decades ago, today it is totally common to have an assistant that is similar to Siri.
I do believe AI will shape our world in ways we cannot predict now, I also would like to leave this interesting article here in case you have some free time ^^