I never understood the problem with pentalobe screws. Yes the head is uncommon but it is trivial to get a screwdriver with the correct head. I came across sever

I never understood the problem with pentalobe screws. Yes the head is uncommon but it is trivial to get a screwdriver with the correct head. I came across several screws that were too small for the heads I had in my toolbox and never accused the assembler for using uncommon screws. Is there a patent on the pentalobe head so the screwdrivers are illegal?