Screws hold things quite well. A screw often holds a pool cue shaft to a pool cue butt, there is little discussion about how easily they fall apart. A screw holds a carbide insert on an indexable cutting tool where there can be a lot more force and vibration than a simple cue tip, and wow can they do precision work with them. They don't fall off that easily if properly installed.
Regarding the shape, I would presume that any tip can be shaped to ones preference independant of how it is attached.
I will never refrain from asking for scientific evidence. You may be an engineer who goes with the popular cultural ideas, but not me. I'm one of those "show me some proof" kinda guys, not one who takes a "trust me" answer well ... that is ridiculous to me.
See above, threaded fasteners can hold things on quite well ... you'll be happy they do as you drive your car. Regarding 'feedback and control', I would have to see the testing to believe there is a significant difference between the two fastening methods, other variables being equal.
Dave