> The founders effectively took everyone's voice away

Setting aside the merits of all the underlying arguments, the founders were clearly only talking about their "voice" within the context of their employment at basecamp, not their ability to have a voice in all other possible contexts. And thus the following is a non sequitur:

> having a voice is more important than working at basecamp

Being an employee at basecamp is a necessary prerequisite for having a voice as an employee at basecamp.