Per Florida statute:
the managing entity [i.e. Disney] of a timeshare plan is authorized to manage the reservation and use of accommodations using those processes, analyses, procedures, and methods that are in the best interests of the owners as a whole to efficiently manage the timeshare plan and encourage the maximum use and enjoyment of the accommodations and other benefits made available through the timeshare plan
This is why, for example, Disney could change
Point Charts without membership approval (and a lot of members were really upset when October and November became more expensive).
The State of Florida already grants to Disney the authority to manage the reservation system using "methods that are in the best interests of the owners as a whole".
Disney does not need approval or to change the POS to modify how reservations are made, as long as they do so "in the best interests of the owners as a whole".
I get the impression that there are more members that dislike walking than like walking. Therefore, placing limits on walking are "in the best interests of the owners as a whole".