This sounds like a very naive view of biological systems. The complexity of the most complex thing computer science has created (I would argue that is the Internet) is still trivially simple compared to the brain.
What that means is the search space is huge, much larger than any space I've dealt with in computer science.
However, there may be something to what you are saying (I don't know enough about medical research to know whether they are already doing this or not). In public key cryptography, you have a huge key space to try if you want to brute force a key (2^64 for a 64 bit key, unsurprisingly). However, you can break a 64 bit key in about 2^40 operations if you use the right technique [1]. Are we spending enough time looking for those techniques? I certainly hope so. There are a lot of smart people in medicine.