Brute force is certainly the wrong way to put it, but that doesn't mean it's easy to distinguish superhuman effort from superhuman intelligence, or, in the words of Thomas Edison, perspiration from inspiration.

Especially as the pure gruntwork involved in acquiring the knowledge required to merely understand the details of the mathematics involved represent at least a significant fraction of a human lifetime.

And unless this human process of knowledge acquisition continues, eventually no one will be left to understand and attach any significance to the results machines produce.