"Just" filing an issue takes time and effort. Providing a patch takes significantly more time and effort. Potentially the difference of a few minutes vs a few days, weeks, or longer, depending on the issue at hand.
There is value in filing well written issues, and no one should be shamed for "just" filing an issue to the people best equipped to resolve it, rather than trying to fix it themselves.
You should probably have read the comment that person was responding to, because you seem to have taken the response out of context. OP did file an issue over a year ago, and didn't submit a patch, so they did indeed "just" file an issue. Then they proceeded to whine about no one working on their issue for free.