Way has explained that the song was inspired by various personal experiences and observations, as well as his overall state of mind at the time. Here are a few reasons why he might have written the song:
1. Personal Experiences: Way has spoken openly about his struggles with depression and drug abuse in the past. "Welcome to the Black Parade" could be seen as a reflection of these personal struggles and his journey towards recovery.
2. Social Commentary: The song contains themes of societal alienation, social injustice, and the feeling of being lost or misunderstood. Way has said that he wanted to address these issues and connect with people who felt similar emotions.
3. Metaphorical Representation: The song can be interpreted metaphorically, representing a transformation or a journey into the unknown. The "Black Parade" could symbolize a transitional phase or a state of emotional darkness that the protagonist must navigate.
4. Artistic Expression: As an artist, Way often uses his music as a form of self-expression. "Welcome to the Black Parade" allowed him to explore complex emotions, share his perspectives, and connect with his audience on a deeper level.
5. Catharsis: Writing and performing the song may have provided catharsis for Way and the band, allowing them to release pent-up emotions and find solace through their art.
6. Musical Inspiration: The song's dramatic arrangement, incorporating elements of marching band music, could have been inspired by Way's fascination with theatrics and grand performances.
It's important to note that the exact reasoning behind the song's creation is subjective, and Way himself may have multiple reasons for writing "Welcome to the Black Parade". The song's lyrics and imagery leave room for interpretation, allowing listeners to connect with it on a personal level and derive their own meanings.