If you've ever looked at your pinhole through a microscope, you've probably seen just how excessive the concern about "optimal" can be. Getting the hole to be clean and free of metal junk when it is new is a real challenge, and keeping it clean afterward isn't much easier. You could have a "perfect" pinhole and still get very disappointing results.
I have. Attached is a laser-cut pinhole and it's comparison with a crude needle-through-cardboard job.