I was criticized recently by someone whose opinion I could care less about.
The initial reaction I guard against when criticized by anyone is to get defensive, but more so when the criticizer is not a friend, colleague mentor, or family member.
However, in every case, even ones like the above where I don’t care what the person thinks of me, I assume their criticism is at least partially true. We all have blind spots.
Instead of arguing, I seek to address it.