The person I originally replied to explained that deleting your own posts hurts other humans because your posts aren't available to search in the future. I'm saying that helping someone answer "best blenders 2023 site:reddit" isn't the intention you have when you reply to someone on Reddit/HN, so who cares. It's like saying I shouldn't delete my posts because it will hurt ChatGPT's training data.

What I'm not saying is that you should expect privacy for comments you post online.