On the plus side, it gave you something to complain about.
Sure, if you don't have a visual impairment. I do, and even though it's a very mild one, if one in 100 blog posts submitted to HN consider changing their colour scheme due to people complaining about it I would say it is worth it. And frequently I do see people changing their colour schemes based on HN feedback.
(depth of this thread and meta-meta-meta acknowledged and ceased)