The funny thing about the sentence I just wrote is that you could validly echo it back to me. At least the self-indulgence part. Unfortunately for you, I have been thinking about my maturity level while writing this post.
In all seriousness (and my first sentence was serious too), what we have here is that your comment's parent was written by a person who is comfortable with making light of human tragedy, something which you are uncomfortable with. I'm not sure what that has to do with maturity, and in fact I'm not sure what maturity is or why you think that attribute would be a sign of immaturity.
