Not really. The land they have is a patchwork of land OK to build on and land that is horribly awful to build on. They naturally built on the land OK to build on first. The monorail was supposed to solve all transportation problems, but they then found it has its own limitations. That's when buses became widely used.
But then something horrible happened: WDW became too popular and the ever increasing attendance kept outpacing bus capacity. That's why, in my post above, WDW recently bought more buses and is doing everything they can with the roads and infrastructure to make the buses work. And that's including taking some of their load off their hands with the Skyliner.
Oh, and another setback for buses: The ever increasing use of ECVs. Buses were just not made for them. And even the new ones that are, can't deal with them quickly and efficiently.