This devolves really quickly into debates on semantics. Which is not a bad thing, but it means it's important to be clear on definitions.

I've heard Artificial Intelligence snarkily defined as "whatever computers can't do" - once a human understands the problem well enough to make a computer solve it, solving the problem is no longer "AI".

What this says about human intelligence, if-and-when a computer can perform the full set of tasks a human can perform, is left as an exercise to the reader.

In any case, right now, a computer can provide answers to certain problems much more quickly and accurately than a human, and can provide more optimal answers. Whether a particular computer does this via hand-tuned heuristics, brute force applied to simple algorithms, or statistics over massive data sets, or some magic "AI" voodoo, it does it.