Comments are probably have positive usefulness expected value in a probabilistic sense. Unfortunately extracting that value, separating the insights from the dross, is work and requires effort. Effort that perhaps the person doing the original work being commented on shouldn't necessarily be expected to take up.
Additionally, human nature makes it hard to receive legitimate criticism dispassionately, let alone when it comes in a big pile of stuff that also contains pointless abuse.
There is value in comments, but depending on a project's circumstances it may or may not be economical to extract it.
> Effort that perhaps the person doing the original work being commented on shouldn't necessarily be expected to take up.
It doesn't apply to all situations, but sometimes you end up with less net effort by listening thoughtfully more. I expect this is especially the case when you want or need to optimize for some form of popularity. If you're just making things for the joy of creation, sure, just ignore everyone as that's certainly more work than pleasing only yourself.
Additionally, human nature makes it hard to receive legitimate criticism dispassionately, let alone when it comes in a big pile of stuff that also contains pointless abuse.
There is value in comments, but depending on a project's circumstances it may or may not be economical to extract it.