This is ignorant to the history of Open Source software. Software has been open long before it was subsidized by large corporations.

"Computer software was created in the early half of the 20th century.[2][3][4] In the 1950s and into the 1960s, almost all softwares were produced by academics and corporate researchers working in collaboration,[5] often shared as public-domain software." https://en.wikipedia.org/wiki/History_of_free_and_open-sourc...