This is such an old and tiresome argument.

First, just because you made it work, doesn’t mean that applies to everyone. Congrats on your success, but let’s not generalize with one data point.

Second, what about marketing costs? What about a first-mover advantage and staffing up to win that advantage? What if you want to tap into a network (YC, tech stars, etc.)? What if you really value the good feeling of being validated by having a round of financing? What if bu raising capital you get attention that kickstarts your business that otherwise wouldn’t have come?