With funding, you might be in the situation of having not a single cent more in revenue (possibly less, trying to buy growth) and failing hard because of having

With funding, you might be in the situation of having not a single cent more in revenue (possibly less, trying to buy growth) and failing hard because of having 30 employees more than you have now, and not the tiniest idea of how you could get by with less. The intersection between the set of business opportunities that can work bootstrapped and set of business opportunities that work when strongly funded might be much smaller than one would naively assume.