Employers are concerned that injured employees will essentially try to "tack-on" the weight loss procedures any time they get surgery for work-related injuries. It could also prove an expensive point of litigation with battling experts hashing out alternative weight-loss methods and the necessity of weight loss.
Obese employees could view these cases as a victory but should not be so quick to celebrate. Sure, there's a good chance their weight-loss procedures could be covered should they need it for an operation for a work-related injury. But, employers will be aware of this potential cost of hiring and employing obese individuals. This could lead to discrimination against a group that is often discriminated against with little legal protection. I will note that the ADA covers obese individuals in some circumstances and some state laws may provide coverage as well.