instruments up

digitalmusicnews sez:

The sinking CD is often contrasted against healthier music industry segments like touring, publishing, merchandising, and advertising. But sales of music instruments are also quite healthy, and a reflection of an ever-increasing demand in music.

Against that trend, big boxer Best Buy is now stocking up on musical instruments, according to details revealed Monday.

If you add up gains in parts of the music industry outside of record sales, do they balance out? And if they do, why is it a bad thing for musicians who lose their job as a clerk in a record store to get a newly created job as a clerk at a guitar store?