Here’s the heart of it:

🌪️ 1. Baum wanted to satirize American hero worship
The Wizard is basically a traveling salesman with a good PR department. He’s not evil, but he’s not a superhero either — he’s a showman.  
Baum grew up in the era of:
- snake‑oil salesmen  
- political hucksters  
- “great men” who weren’t actually great  

Making the Wizard a fraud with a heart let Baum poke fun at the American tendency to idolize people who look powerful but aren’t.

🪄 2. Oz is a fantasy world — its “superhero” is magic, not muscle
Baum wanted Oz to feel different from America.  
If he’d made the Wizard a rugged, self‑made American hero, Oz would feel like Kansas with better lighting.

Instead, he made the Wizard:
- mysterious  
- foreign  
- theatrical  
- a little ridiculous  

He’s a contrast to Dorothy, who is the all‑American figure — practical, kind, grounded.

🎭 3. The Wizard’s whole point is that power can be an illusion
Baum loved the idea that:
> “You already have what you think you need from someone else.”

Dorothy, the Scarecrow, the Tin Woodman, and the Lion all discover they had their qualities before meeting the Wizard.  
If the Wizard were a true superhero, that message collapses.  
His fraudulence is the lesson.

🇺🇸 4. Baum was gently critiquing American leadership
Not in a harsh political way — more in a “let’s be honest about our leaders” way.  
The Wizard is:
- well‑meaning  
- insecure  
- improvising  
- trying to keep everyone happy  

Sound familiar?  
He’s a very American type — but not the heroic one.  
Baum wanted kids to see that leaders aren’t magical. They’re human.

🌈 5. Dorothy is the real hero — and she is the all‑American figure
Baum didn’t skip the American hero; he just gave that role to Dorothy.

She’s:
- brave without bragging  
- compassionate  
- resourceful  
- morally clear  
- homesick for Kansas  

She’s the American ideal — not the Wizard.

---

If you want, I can go deeper into Baum’s political views, the Populist movement, or how the Wizard has been reinterpreted in later adaptations.