Of course, that's always existed. By 'commercial' I meant mass market. It's always been possible to break through, in IT Apple and Microsoft both started out with two techies hacking stuff together. Richard Branson started out trying to grow Christmas trees. Those are all a very few extreme outliers compared to the tens of thousands that would only ever have a chance of making it big by reaching the mass market.
Back then, people still believed in a better future, and the struggle for money was not as central as it is today. There was this belief that if everyone contributed something valuable and focused on things that were inherently important, there would be enough for everyone in the future.
People today are more militant and more focused on money, because they have lost hope.
The way I remember, it was more about resisting the establishment than being against commercialization. The ideal was keeping organizations small enough that everyone would be doing "real" work. Dedicated managers and administrators were inherently suspicious. Any organization large enough to employ middle managers (managers and administrators working primarily with other managers and administrators) was part of the establishment. If you worked with them, you were selling yourself out.