Ask somebody in the Valley who sees more of them, but N months after a Series A, I'd expect to see at least 8 people on the team and probably closer to 20. That implies a salary bill in the, hmm, $100k to $200k range. Every two weeks, due like clockwork. Obviously, if you've already hit ~$500k a month in revenue, you're golden (as long as you freeze hiring), but most similarly situated companies haven't hit that yet.
If you're already at $500k MRR, you're in Series B territory.
So if you can convince your entire team to eat ramen for an indefinite period of time between your first raise, and your second raise, you would have "solved" this problem for some definition of solved.
You may be able to revert to ramen profitability again, but it will be painful (cut your burn rate).
Money is used to purchase acceleration. It's not totally crazy, although it implies very different trade offs as compared to running one's own business without investors.