Writing’s low-cost-of-entry makes it the perfect low-risk creative activity …and therein lies the danger.
If you are investing nothing in your writing, what’s to stop you giving up when it gets hard?
One’s writing career — the efforts, the time, the stories themselves, and the writer that culminates through all of that — should be seen as an investment. Pay in early, it yields bigger as time goes on. You will earn more as time goes on and as you become more capable — and as you produce more work and gain more audience and garner new contacts in your industry. It’s like a role-playing game. You eventually level up and gain weapons like THE BATTLE-SCYTHE OF STRUNK-WHITE (+2 against stylistic errors)