Both add to your bank balance…
But raising money (borrowing it or selling equity) creates an obligation, while selling something delivers value to a customer.
Raising money is hard to repeat. Selling something repeatedly is why you do this work.
If things are going well, it might be time to sell more things to even more customers, so you won't ever need to raise money.
And if things aren't going well, the money you'll be able to raise will come with expectations or a price you probably won't be happy to live with.
When in doubt, make a customer happy.
[My exception: it pays to borrow money to pay for something (an asset) that delivers significantly more value to more customers more profitably over time. In the right situation, it's an essential building block to significance, but it's too often used as a crutch.]
[A different myth, re book publishing.]