In your case, if that nice dinner is in the bubble, you're absolutely right but do they have enough tables at resorts across property to support that for the number of rooms assuming 2+ guests per room?
If your behavior on vacation ad Disney World were typical, the entire property would look very different from what it does.
And do you know why people complain about it being exhausting after it being expensive? Because most feel, at the prices they are paying, that they need to maximize their time to get value from that.
If you're cool paying a lot to stay in a Disney resort that offers less than average services at it's price point, paying good money to go to a park and spend half a day or less there and then also paying more than is typical for the quality, for a meal on property, you are almost Disney's perfect guest. If you also sign up for a couple of desert parties and you're happy, you are their perfect guest.
No judgement here. If you have the money and you see value in it - more power to you. You're clearly having exactly the vacation you want and are happy with your spend so it all works out for you.
I would venture to guess, that again, you are not the typical guest, though.