I know you've said this before, and it's true to some degree, as TDO clearly would rather not pay the labor.
But they cost virtually nothing to set up or create. Minimal upfront capital, and...voila, you can promote a new "experience" for guests. It would take decades of paying for the labor of meet 'n greets before you'd ever come close to the cost of building, and then maintaining, a new attraction. Why do you think Rasulo wanted meet 'n greets as part of the FLE rather than the mine train ride?