I find that there's a lot of good information in the comments on HackerNews, so sometimes advice and recommendations aren't just designed for the parent comment.

Your reply adds nothing of value and comes across as being rude - you could have simply ignored my comment if you found it of no value to you.

Those mechanisms exist for the inexperienced author (especially in a team setting) where you want some minimum quality and consistency.

An example where Shellcheck might be useful for you is when working with a team of junior programmers. You don't necessarily have the time to teach them the ins and outs of bash, but you can quickly setup Shellcheck to make sure they don't make certain types of errors.

I think your position is totally valid and nobody can or should force you to use a linter, but I think that even for you there _can_ be situations where they might be useful.