Firefox is an unusual exception, but I do appreciate the exception. I don't get your car analogy. Mechanical engineers had to design the car, and mechanics are

Firefox is an unusual exception, but I do appreciate the exception. I don't get your car analogy. Mechanical engineers had to design the car, and mechanics are needed to service cars. People who are either of those are free to do it themselves. What's the point? A business owner can't just fire up Linux and watch their bank account rise. There is a specialist job there to connect the business owner with the service that they need - unless, of course, the business owner happens to be a technical specialist.