system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is Tesla selling direct to consumers a problem? Why don't other car manufacturers do it?

Are the laws or requirements that force manufacturers to use dealerships?  If so, how is Tesla not following those rules?
gpt
Dealerships are forced by law so that price fixing isn't done to drive competition out of certain areas. 

Lets say Ford starts selling its cars at a loss in California thinking its marketing will lead to more sales else where for example. This would be bad.

Tesla is a very small company when compared to the big 3, even foreign automakers. Therefore dealerships can't directly partner with it because they just don't move cars to be profitable (for the dealership).

That's why Tesla has to sell directly to the customer, which in some states (in the US) is illegal.