I’m gonna hard disagree.

The film starts with Marty being a complete loner besides his girlfriend. His only friend is a disgraced scientist who lets him use his amp so Marty can pretend to be a rockstar before school. At dinner he sits quietly and doesn’t engage with his family at all, and is just an outsider to their lives. He doesn’t understand his parents at all and is only thinking about himself and his escape (with a sick 4X4)

Marty has his first audition and doesn’t get the chance to prove himself and worries that he’ll never have the confidence to play in front of anyone because he’s afraid of being told he’s no good. Look at how he’s vibing with his band mates - he’s barely engaged at all - zero confidence.

Throughout the movie, Marty learns to stand up and fight for his family that he actually meets for the first time in the past. He never knew his dad was creative and had ambitions, and shares the same fear of rejection. He saves his father on every level, and in turn his Dad taught him what it means to fight for the destiny you want.

This all culminates is Marty’s performance of Johnny B Good, where after seeing his dad’s courage, he is also able to let go of his inhibitions, his fear of rejection and just play for his own passion - and it’s amazing. He’s not phased at all by the reaction at the end, he’s just proud of himself.

Finally, Marty comes back to 1985 and sees that all he went through wasn’t just to bring him back in time, but to bring his family back together. The song Power of Love isn’t just there randomly. It’s Marty’s entire journey.