If the styles ( i call it dead styles) are too busy ( mainly poorly written bass and chord lines) and or too dry , that's what the player is trying to mask ( and also trying to do his best to put better dynamics/expressiveness with the style).
A well written style with good expressive dynamics will not have that problem.Left hand alone is sufficient.R hand for OCCATIONAL pad/strings/small licks when singing ( unless you are playing the melody).


I found it to be the case with most styles in BK and also new PAs. (only few styles are good IMO).

We are taking about bad bass lines /fill -licks that are not very generic enough to cover most songs or too plain when you progress to the next variation.