But it's not. LinkedIn's data is their entire business. They are within their rights to restrict access to it.
This is the classic ant and grasshopper story. If HiQ wants access to the type of data they are scraping from LinkedIn, they can build that data themselves.
"There has grown in the minds of certain groups in this country the idea that just because a man or corporation has made a profit out of the public for a number of years, the government and the courts are charged with guaranteeing such a profit in the future, even in the face of changing circumstances and contrary to public interest. This strange doctrine is supported by neither statute or common law. Neither corporations or individuals have the right to come into court and ask that the clock of history be stopped, or turned back."
> If HiQ wants access to the type of data they are scraping from LinkedIn, they can build that data themselves.
https://en.wikipedia.org/wiki/Feist_Publications,_Inc.,_v._R....
If they don't want their data to be public, then they shouldn't make it public. They could require authorization to view any content on the site and solve this problem instantly.