I agree; saying "the brain is a computer" is much like saying "the universe is a computer".

We can simulate the universe with astounding accuracy on many levels (though not all) with computers. Furthermore, when studying the universe deeply we see astoundingly computer-like traits[1]. But to express this by saying the universe is a computer is very misleading.

Similarly, artificial neural networks simulated by computers achieve huge strides in AI, accomplishing things many said would always be impossible (e.g. art[2]). Also, we see many computer-like traits in the brain. But to express this by saying the brain is a computer is very misleading.

[1] http://lmgtfy.com/?q=the+universe+is+a+computer+simulation

[2] http://googleresearch.blogspot.ca/2015/06/inceptionism-going...