They can express such vivid and passionate emotions, the violin isn't a mere tool, they use it as a voice for all the tenderness and melancholy of their soul. They reach and stab all hearts with their bow (used to rub the cords, but cupid implied too). You will love the gentle nostalgia, or will hate the loneliness and sorrow; but it will touch your soul so deep that you will have no other choice than to feel it.
Otherwise the violonist would make plain sound, or horrid noise.
"I'm gonna become famous with my new violin and make lots of money!"
*The poor violin screams under a lack precision and passion, the poor thing crying for the mercy a bonfire.*
Man that shit doesn't do what I want, it must be broken. The hell with it.
*Sells it for boose, to lower the awareness of some already brainless chick, to fuck her a big 5 minute of effort, while she'll do the star.*
Don't waste good despise on skilled people, do it on mediocrity. For a better world, or at least a trying one.