Hmmmm, I take slight offense at that only because there are two good Broadway style shows (Aladdin, Mickey & the Magic Map) and my favorite Billy Hill & the Hillbilles. Plus the new storytelling shows at Fantasy Faire which are similar to Belle's Enchanted Tales. Yes, not the same number as shows as WDW, but you're also talking about the difference between four parks vs two.
I think this fits under the OP's original point here:
9. Do all the things you love at
Disneyland. If you love shopping on Main Street, shop. If you love meeting the characters, meet characters. Disney World might not feel like Disney if you don’t take time to do the things you normally do at Disneyland.
If you like to go to shows at Disneyland, then go to the shows at WDW. If not, then don't. Personally, I love Lion King, Finding Nemo puts me to sleep every time and Beauty and the Best is OK (imnsho ;-)