Most freelance journalists I know are generous with their (our) time. But time is finite and life is short. My waking hours are split between earning a living and being with loved ones. The economics of freelancing generally mean long workweeks.
Often people make free-labor requests of self-employed writers that they’d never make of, say, self-employed electricians or plumbers. When I do unpaid work, it is a zero-sum game: Either I forfeit paid work or I spend less time with friends and family.
That’s why I typically decline such requests. I urge you to value your own time similarly.