The original articulator of open-source values, Eric Raymond, whose essays helped crystallize open source as a "movement", gets free software on a fundamental level. He and Stallman were once close friends, and from his blog posts and comments it seems he and Stallman are in broad agreement on the points of software freedom being good and proprietary lock-in being evil.

The reason why open source is a "thing" is to convey these benefits -- these virtues -- to an audience that doesn't think like Richard Stallman. I.e., most of the world. It was an exercise in much-needed marketing for the movement. At the time, no one could out-market Microsoft. Microsoft were licensing Stones songs and lighting up the Empire State building to promote Win32 duct-taped to DOS. Unless free-software hackers had a counterstrategy that didn't sound like a tin-pot revolution organized by bearded, Kaczynski-esque radicals, they would lose and lose big.

Criticize Raymond's efforts all you want. 20 years ago Microsoft was making strategic acquisitions to quash the viability of free software; today they're making strategic acquisitions to be at the center of it.