The meme of dude standing in corner while everybody else dances as he utters an elitist thought to himself explains many jazz musicians, especially the protagonist in whiplash
Any opinion of actual jazz musicians formed on the basis of this film can be safely disregarded ab initio. Music snobs exist, but that movie is full of strawmen. A real shame as it was otherwise very well-executed but stuff like the finger-bleeding scene ripped straight from a Bryan Adams song does it no favors.