0-PMF/100 customers: Bootstrap it
PMF-Scale: VC Fund if you can show 100% growth each year and forward. If the market is big enough (TAM etc), This can become a billion dollar company and for this to happen fast enough, you will need funding. Also, the reason you need funding here is because it is very tough to scale a business slowly. Either you grow fast from here or die/stay average growth.
Again, like you said, nothing wrong with "chart my own path" but VC funding has its needs. It's just that most people try to raise funding way too early and hence cannot keep up with the growth requirements and eventually either die or sell/pivot for peanuts.