Answer:
True.
Step-by-step explanation:
Basically, musical appreciation is the fact of knowing how to listen. Listen to the music, pay attention to its message and meaning, regardless of genre and style.
When a musician closes in on a particular style, he is, in effect, giving up more comprehensive performance possibilities.
Not knowing the basis of classical music, for example, he is relegating to the background a repertoire of techniques and a library of ideas that can be very useful in composition.
And that goes for both popular music and jingles, soundtracks, concerts and more. By not giving value to the spontaneous cultural manifestations of a society, he is delimiting his field of activity, either as an interpreter or as an arranger, for example.