Why Doesn't Magic Always Work?

Hello EA. Sometimes we hear about magic not bearing any fruit even though it is performed impeccably- proper willpower, desire, technicalities, etc. Many out there will say that it was not the will of ‘the Universe’ which needs to maintain balance, or it is about karma and the likes. I refuse to accept these theories. Magic exists for a reason. To change our fate if our work on the mundane level isn’t enough.

What are your views on this?