Speed of growth.
Being profitable is one of the best times to raise. You don't need the money, but it'll accelerate the next phase of growth.
Retaining profitability after raising is probably harder as you're expected to spend that money to grow.
I'm sure it can be done if you've raised with the right people and you keep focus on ARR per FTE.
And if you raise after you’re already profitable, you have a lot more control / leverage over the terms and who is involved.
> Speed of growth
But the post we are discussing is literally about hiring slowly and only if really needed and only hiring the "next great engineer".
I understand that the post words are written deliberately in a way open to more interpretations, and the "only if needed" can apply to "we need to take on more Atlassian customers so we need this and that".