Aren't all beliefs some form of attachement? Isn't the LoA an expansion of how things will resonate, like piano strings that will vibrate to sound waves from another string that are harmonically realted? So then we are string pluckers and the universe is an grand piano with the dampers up. But then also we are the piano too? So at some level we can pluck a string as an intention or as our vibe and the other strings that are in harmony vibrate too, which is the universe's response. So then we have to stretch our minds to grasp how that is for ourselves having intentions/vibes.
One thing I often think is how we talk and write from the world of the ego/separate selves/objective reality when we say we intend so and so. How is that intention being seen in the "we are all one" frame? I also think when we effectively intend we are tunning into the universe and "all that is" such that what we are asking for is in harmony with the grand piano of the universe.
But then also we can intend or vibrate in such a way that it's hard for the other strings to vibrate with us and nothing manifests. Or we get dissounance and friction instead of harmony and ease. That can be that we are intending things out of alignment either with fears or infringing on others. I'd say, from my limited reading about LoA/IM that it works when our intentions are in alignment with "all that is" and actually you, me and everyone is one with "all that is". Thing is there are tons of intentions we can have that are in alignment and we get to feel like we are making choices in our illusion with an ego separate self running around. Now, if we aren't getting what we want, the LoA/IM stuff says that's becuase of fear or not knowing your unconscious vibe - no being coherent. But the fear and not knowing your conconscious is a form of not being in aligment.
I'm not an expert at LoA and don't want to "believe" much of anything. However I've had experience feeling the "all that is", being one with everything and that state has no thought and no fear and is difficult to stay in since as soon as I notice I'm in there I have a thought about that state and pop out of it.