YouTube comment sections are weirdly positive always. It could be a video of some horrible crime and the comments will be about how great the channel is and encouraging the channel to keep making more videos. When j visit actual fan pages anywhere else online there are always a mix of opinions. But youtube is constantly full of obsequious people
There is literally tens of millions of people dying every year, so it’s not unlikely that over the years thousands of comments gather with stories where a song meant something to one of the millions of dead. It just feels a lot compared to YouTube videos.