I’m not making a dig at people here. This is just human nature. It’s difficult to see the value in something that you only see as an obstacle.
Open source software is rather unusual. It’s a commune on a massive scale and it gets its value from the generosity of others. in my opinion, it is possibly one of the greatest achievements in the history and future of computing.
However, it heavily depends on copyright to exist. GPL has encouraged (or forced) many companies to contribute to the community when they wouldn’t have otherwise.