It's scientific knowledge.
It should be accessible to everyone, period, with the small exception, arguably, of extremely dangerous techniques such as methods of creating artificial super-viruses etc.
Science thrives by the collective discovery, review and improvement of knowledge. The more the disseminationof the knowledge is, the more valuable the knowledge becomes, and the more likely the knowledge is to improve faster.
Throughout history, some peoples' contribution has been to insert themselves as a toll troll on the bridge, even if the bridge was built by others. This is a despicable friction on the function of society.