Is the proliferation of car brands harming the motor-vehicle ecosystem? Surely it would be better to restrict sales to two car brands and only allow two models

Is the proliferation of car brands harming the motor-vehicle ecosystem? Surely it would be better to restrict sales to two car brands and only allow two models within those two brands. (That's a ridiculous suggestion, isn't it? About as ridiculous as restricting the number of Linux distros. As with cars, people want things that suit THEIR needs better, not what everybody else in the world THINKS they should use.) The beauty of Linux is that distros can be as individual (Ferrari) or as widespread (F150) as the cars on the road are. So some people like Windows (Ford) or MacOS (GM), so what? The choice of Operating systems can be as broad as the choice of cars.