It's definitely not true for enterprise software, which can quickly get in to licensing fees measured in number of equivalent yearly developer salaries.
The statement is true for most enterprise software. That's the point!
Even in that category, there aren't that many software that charge in the millions of dollars per year (i.e. multiple developer salaries) and when they do they tend to require a sizable workforce (i.e. many developers and operations).
Roughly speaking, all software are free.
The bulk of the money goes to pay the developers and the sysadmins around the software, not the software itself.