Before a knee jerk response of unconscious bias, which I’m in no way denying, it is more important to know how this research was conducted. What about the publications and references? It’s not like the job is flipping burgers - postdoctoral positions are extremely specific and people tend to know each other within a couple of hops on their social network.
In fact, in many cases it is very unlikely that you will find a postdoc that has done work in a cutting-edge niche area that a professor is interested in, so the pool of candidates even globally is not sufficient. Your best hope is to find a postdoc in an adjacent area who you can train up on what you are doing.