Earlier quoted context omitted.
A followup: The GNU project was born while I was in junior high, gcc started when I was a senior in high school. Linux was started when I was in college. Stallman, in a very real sense, made my entire career possible. Likely yours too.
That is a jump, software may have eaten the world without free software and been more lucrative. It is impossible to know.
I've seen both worlds. You don't want to be in that other one, trust me. What I will say is not that free software has made my career possible, more that it has made it possible for me to do my job without going crazy. No more reverse engineering bizarre bugs in my tools. No more building everything from scratch because I can't possibly trust anybody else's code. Not as much struggling to deal with boneheaded vendor lock-in that some executive in the nose-bleed seats commits me to (OK... it still happens... but it's a lot better).
I'll be honest, though. I didn't actually believe that the reality we have today, as flawed as it still is, would come. I'm incredibly grateful.