Its much easier to raid a big company because they have a clear physical prescence and a strong interest to focus on their core buisness. For example, some people in the company may defend their tor node, but managers will look to the interests of the company as a whole, concluding that the loss of dozens of jobs is not worth risking over something that is not a core competancy.
It seems like you're arguing from a pure realpolitik perspective. The FBI is going to raid your Tor node because they know it will make your boss unhappy.
Even under that assumption, what is the FBI's motivation for doing this supposed to be? They can obviously only do this for Tor nodes within their jurisdiction, but that's where they want them to be because it's easier to capture their traffic. It's not like exit node operators have any actual connection to the crimes the government may be investigating. The main thrust of the other Tor article on the front page[1] is that the primary source of criminality on Tor is hidden services that don't use exit nodes.
Indeed, but this perspective comes from the large number of people that make up an enterprise and the interwoven net of responsibility. One person can choose to fight for liberty and risk ruin, but its much harder to justify risking the other hundred people in your company.