You have a point, but often it seems that if a comment got a downvote because some rando took exception to it without a good reason; then the crowd will vote it

You have a point, but often it seems that if a comment got a downvote because some rando took exception to it without a good reason; then the crowd will vote it back up fairly soon. And indeed, your comment is not grey at the time of writing. I personally am not a very consistent upvoter unless either a) the comment was amazing or b) it looks unfairly downvoted.