Also, her jumping in to say she doesn't approve of tattoos because Reasons is...not new information. I feel like here, sure, we might say 'instead of figuring out how best to do X, you should do Y instead' because we feel like, maybe the OP has genuinely not considered that point of view. But it's highly unlikely the letter-writer hasn't heard the opinion 'some people hate tattoos and think it will look stupid when you get old' before. It's not helpful, because it's not giving the LW a new perspective. It's just stating one side of a controversy.
It just rings to me of all those people who act as though they're being really unique and transgressive by having 'old fashioned' or 'traditional' values. It's not as though not liking tattoos is a shocking, uncommon thing.