Facebook as a monopoly of a sort and so is hard to get away from. If I don't like Tesla there are many other options. Even if you only buy EVs, there are a lot of options that you can buy today. The only people who have to buy Tesla are the type who are buying 10 year old EVs (the limited range on 10 year old Nissan rules them out).

Difference is their product is so good as to be basically irreplaceable (good = strong network effects, which is the only flavor of "good" that matters)

There are network effects to social networks that do not apply to choice of vehicle