i think its kind of funny, simulating this must be incredibly tedious while there are many songs with good fake violins...

you mention a few details theres so many more if you think about it..the human-instrument interaction has all sorts of imperfections.

tension in shoulders can make u bend the neck a bit. tension in fingers too much might pull out of tune. pushing not 100% straight along the bow might shift it sideways a bit changing how it crosses strings. Then ofc at what position is the bow on the strings (closer/futher from bridge).

humans are not perfect machines but in those imperfection lies the beauty. A perfectly played instrument is played by a human and has this 'humanization' across all areas where human and instrument and music itself interact imho.

if you produce music digitally this instantly will show, because all your instruments will sound flat and boring if you dont humanize.