Was gonna say...I'd assume they would hire people "In the know".
If that’s what someones passion is - it is done all day, in person.
You’d be amazed at the level of instrumental AND overall musical knowledge the people I worked with garnered, some tenured upwards to 40 years, some retired local musicians, band directors.
I did sell band, orchestral, AND drums.
Though I’d look and gawk through literature as a kid, right out of H.S., it is here where I learned about continuing education.
Continuing to educate myself primarily in drums since working there back in 2001-04, I’m no expert and wayyy far from it.
Drums we carried DW, Gretsch, Pearl, Premier, Yamaha, Roland, guitars we carried Gibson, Martin, Fender.
Our floors didn’t just have entry level stuff.
We had full lines of Zildjian, Paiste, and Sabian, where I first fell in love with a 16” Paiste Alpha crystal crash with the block tapered bell.
Some memorable kits on hand were a cherry to black fade 6 piece exotic DW that was retailing for close to $7k, beautiful ebony satin oil with black hardware 4 piece DW that was so gorgeous yet looked so mean, dark red Premier Signia, couple of Genistas including the cobalt blue, RCs, SCs.
We had the $6k Roland V drums, also where I picked up my V-Club e-kit.
Saturdays were always lively at our music store, we had anything from cats coming in first thing in the morning (opened at 9) to talk about gigs and performances the night before, to band directors drinking coffee waiting for repairs, large pick orders, or just hanging out.
During football season since we were open on Saturdays, we had a teachers rolling tv cart that would be rolled up towards the front for games galore to liven things up as well.