Most coaches will tell you that players learn the most by talking to teammates in the dugout/clubhouse about the game.
"How are you so good at driving the ball the other way?" or "What's your approach when you face a lefthanded pitcher?" Etc...
Asking players that are good at something about how they did it to better yourself is a great way to absorb someone else's info and methods into your own game.
When a player retires, he doesn't just lose all that info (learned or practiced) and forget how to be a teammate.
So for the people who say “just because you played doesn’t mean you can coach”
Okay sure whatever…
But when an elite athlete posts a hitting drill from their career, that’s a hitting drill taught to them by a successful hitting instructor who was great coach
That they then used and had a lot of success with btw