Devil worship isn’t shirk, it’s open defiance of Allah SWT.
You cannot compare that to someone who only means well.
Walaal you are right to a certain degree.
Let's put it this way: both acts lead to hell.
To us muslims hell is not a place you want to be at.
So in our eyes both acts are viewed the same, because they both go to hell.
As a muslim commiting this act, your judgement and punishment will be severe, unless you were really that ignorant, however Allah knows best.
For the kaafirs hell is their destination.
Do you understand it now?