We got a "complimentary" wheel chair for my son once at the CR. I signed a contract that said if I lost, store or damaged the wheelchair, my credit card would be charged $450 for the chair. I'm not sure if it said I would have to pay for any necessary repairs or not, but it would not surprise me if it did.
To take the "if you know you're going to need a wheel chair bring your own" analogy a bit farther to satisfy the greed of the shareholders,
If you know you're going to eat, bring your own utensils. Huge savings to shareholders.
If you know you're going to shop, bring your own bags and packing materials. Huge savings to shareholders.
If you know you're going to shower, bring your own towels. Huge savings to shareholders.
This could go on forever. If WDW wanted to stop complimentary wheelchairs at resorts for whatever reason, fine. It's their policy, but to blame it on something as trivial as probably a five figure cost of maintenance is a little silly.