why don't people like helicoiled bolt holes in intakes

I agree when they are done right but I have seen a few done wrong/crooked, maybe that's where the hesitation come from.
The butchery I've witnessed says that right there. Drilled offset/crooked by a mook deters a bunch who don't want to hog out a hole, or plop the carb down, then finger in the crooked stud every time. Unless You've got a live eyeball on it, hard to tell from pics, so....