you're right. too many coaches teach by giving out 100 instructions
that's why tennis isn't as popular or good in the US
because kids don't realize how simple and fun tennis is
and u never seen a player who's swings look correct, but they miss hit or frame every other shot?
this is because theyre tracking skills are bad or they dont watch the ball well enough
i've been around so many high school and middle school age tennis players. i see that kind of stuff all the time