So what???? It takes a bit of skill to develop a proper touch,but I get 1/4 thou. measurements on small diameter things with my dial caliper. Been doing it for many years.
If you think it's hard,I recommend getting magnifier reading glasses!
The trouble with ANY caliper is they are not as rigid as a mike,and take more skill to use.
If you really need a more serious measurement,of course use a mike. Preferably one with a ratcheting thimble as it removes the human touch factor.