By this logic, TicTac should be worth more than all car manufacturers combined, since there are more TicTacs in an 1$ pack than I will ever buy cars in my entire life. And I'm sure their margin is much higher, percentage-wise, at least compared to most car manufacturers.

Let's be real here: TikTok is a big social network, yes, but ARM owns most of the embedded market. Every smartphone your average consumer buys runs an ARM chip. And hardware is harder to replace than software.