I somewhat agree. Given enough time we can make a machine that does anything a human can do, but some things will take longer than others.

It really depends on what you call human intelligence. Lots of animals have various behaviors that might be called intelligent, like insane target tracking, adaptive pattern recognition, kinematic pathing, and value judgments. These are all things that AI aren't close to doing yet, but that could change quickly.

There are perhaps other things that we take for granted than might end up being quite difficult and necessary, like having two working brains at once, coherent recursive thoughts, massively parallel processing, or something else we don't even know about yet.

I'd give it a 50-50 chance for singularity this century, if development isn't stopped for some reason.