Performing magic does NOT directly lead to a need to go find "black art teachers". Whether you believe in it or not, it doesn't matter, but sometimes people go to these massive "voodoo" centers and think they are doing real magic, but honestly, these places are huge scams. They use illusions to lure people in and then keep taking their money.
The 2 things (our magic and the "voodoo magic") are actually super unrelated in the modern day and age. Anybody who gets into performing magic is not likely to even think about going down the other route. Now, there are those who have, but it is not exactly related.
I believe
@ChristopherT said something about the subject once, you may want to hit him up (though I may be wrong. He may have been talking about a separate discussion about names).