This reminds me of the same dynamic of why Larry Bird was such a "meh" basketball coach. Sometimes folks that are particularly good at "the thing" aren't really equipped to be educators on the topic. That happens in all aspects in life.Oh Someguy you posted while I was writing. Good points. Another caveat is you can be a good teacher without being an expert and experts don’t necessarily make good teachers. The PhD faculty at med school where I teceivec my degree were all renown researchers but had no experience teaching though all had to teach med and graduate students . Despite all their expertise most were terrible teachers- but many didn’t put a lot of work in it. Their research is their main source of promotion. Some were really excellent though. It’s not easy being a good educator as I found out myself. I recently joined a choir I thought it would help
my sight reading music and reading words to sing. Damn it’s way more difficult than I expected. Because my hearing issues I’m having a hard time blending . I’m really loud when I speak and sing. Lol I forgot my point- the singing instructor told me he can teach anyone how to sing within 6 months but caveat is only a few will be singing solos. I can see drum teaching similar most can learn how but fewer will be soloing.
Clearly drumming can have similar dynamics when it comes to conveying concepts via the written or spoken word.