That's basically the meme, right: You rail against corporations and yet you work for one. Curious.

Anyway in general, corporations are sticky. They save resources through scale and collaboration. Famously this is a problem for free market true believers because if you believe that the market is the most efficient mean of organizing people then you would expect firms to operate internally as free markets (or disappear). There is a whole body of work about it,

https://en.wikipedia.org/wiki/Theory_of_the_firm

In practice you can't just become your own boss and compete against firms.