That is wrong: The point of Tesla is not to make money but to accelerate the transition from fossil fuels.... to help meet the existential climate threat- the reason for Tesla is to kill of a criminal industry.
This is a classic dilemma that companies that grow rapidly often face: you begin at the top and then find the top being squeezed as other see the margins and want a piece of the action. Then there are others who are at the bottom but want to work their way to the middle and eventually to the top. So what does a company do, protect the top at all costs, shore up the middle, fight for the bottom? Does the company focus on margins, on product innovation, on market share etc.? Does the company become a niche player or find a way to compete in all segments like some companies have branded products but also make off brand products for others.
These are part of a company growing up and Tesla will have to make some hard decisions in a while on what they want to be or whom they want to cater to. I repeat that they do not have to make that decision today. The market is still growing rapidly so I agree that Tesla does not need to consider the low end competition for now and so a sub $20,000 car should not be on Tesla's mind today. Maybe never.