Ask HN: To what extent is PMF a function of good marketing

When listening to YC videos or general startup talk online I see the idea that you know you have Product Market Fit when you feel an overwhelming amount of growth that you can’t handle.

The Stripe founders said they knew they had it when a customer sent them brownies to get off the waitlist for a feature. Obviously, Stripe had built an amazing product that resonated with users but how much of that success was from a good product vs. good marketing/network effects?

I imagine there are many products out there that people have given up on even if it was able to reach PMF just because nobody knew about it.