I personally like all the live concert songs so I go to every one of them because I want to, but there are people that absolutely despise being there. While in the JP version of the game the concerts are a good way to get a lot of players together to have fun in the concerts, that unfortunately is often not what happens for the NA version. Because of the way people that don't want to go to the concert (but do for the boost) act I think people should be able to get the boost even if they don't attend the concerts
Many people will constantly mention how much they hate the song or having to go to the concerts, so they cause a disruption every time the concerts happen (they constantly bring it up throughout the entire concert). I think it would be better for everyone if we just got the boost regardless if we actually attend the concerts or not. That way it doesn't force people to do something they don't want to, and people that actually like the concerts can go to them and hopefully enjoy them.