Define “the market” though. Why is it that tik tok can not exist and suddenly become a huge phenomenon in just a few years and Facebook can do nothing about it?

Define “the market” though. Why is it that tik tok can not exist and suddenly become a huge phenomenon in just a few years and Facebook can do nothing about it? That to me clearly says that FB doesn’t have a monopoly unless you define the market to be so tightly focused on what they control it becomes tautological