The biggest difference between a GM and a Player is how much control they have over the story. Now a good GM will allow the players to influence the game’s backstory and populate the world with their NPCs. But even then, the majority of the game is something that the GM has control over. They decide which rules to follow, what plot each session will face, and what opposition the players will face.
In real life, we do not have any control of any of those things. Not really. We can try to influence them as best we can, but when it really comes down to it we do not have control of what happens to us, what rules we have to follow, or what new twists will come into our lives.
This makes playing RPGs an excellent place to learn, from experience, just what control we do have in our lives and what we can do with that control. Yes, games really are a place to learn things that can be applied to real life. Who knew?