Exactly. There are three things one might want in their WDW lodging:
1: To be onsite.
2: To have a reasonable amount of space.
3: To spend a reasonable amount of money.
For most people (and for most definitions of "reasonable") you can't have all three of these at the same time. So, the trick is deciding which one you are willing to give up. And, this decision can change depending on the trip,
When we travel with our kids, #2 is absolutely non-negotiable. If we can grab a DVC Villa through RCI, we'll go that way. If we can't, I'd rather live without #1 than live without #3, and we stay at one of the many wonderful offsite timeshares. But, if it's just the two of us, or if I'm on a solo trip, #2 isn't so important, so that opens up the Mods as a possible choice.