I'm very much in support of the open source movement.
The fact that Flash is a plugin doesn't mean it's against the open source movement.
The open source movement has been gathering momentum in corporate markets for several reasons.
The open source movement and the free software movement are different but they work together.
All of these factors allow for the open source movement to become available to all and easy to access, which is their overall mission.
Individuals interested in supporting the open source movement may lack this skill set, but there are many other ways of contributing.
Since the mid-1990s, it has been largely coincident with what is now called the free software and open source movement.
The open source movement became separate from the Free software movement in 1998.
Many amateurs make valuable contributions in the field of computer programming through the open source movement.
The then nascent open source movement eventually filled the void.