I interpret the song as a message of hope to people who are struggling or lost in the world, I relate to the songs lyrics the most, I have felt hopeless, and forgotten, and in distress, but I’ve also been able to heal, that’s why I relate to the song. ( search some lyrics and add little experiences or change some words to make it perfect :)
Some people only recently got into anime for popularity or trends, but it's mostly because people are starting to give it a chance rather than immediately shoving it away because they want to fit in.