I don't understand why they would add two words. I wouldn't mind buying a shirt from GK if the lyrics were correct.
Brighten's merch store used to have a different "in all this chaos" shirt but it's been out of stock for a long time :(
they added the 2 words to try to make it an ~original shirt. they couldn't just take the lyrics, and it was only after everyone saw how similar the two are that they gave any money to brighten. that's why i really don't want to buy the shirt, not just b/c the lyrics are wrong, but i don't want to make GK think that's ok to do.