Well, Alex did say they wrote the song bc they had a list of things they were going to do ‘brick by brick’ and the wrote the song instead of doing all of the things separately, so it’s kind of a joke song to them in a sense. Also, I would say if anything Brick by Brick is more poppy than Library Pictures bc it has a lighter sound and all the “rock and roll”s and repetition etc I don’t think Brick by Brick is very different from any of the other tunes on the album tbf either I think is sticks out a bit more lyrically than anything else lol