Are you willing to get the Covid vaccine when offered?

It only makes sense, as those at the top of the list be the most healthy and benefit the most. If people have poor metabolic health due to personal choices then they should definitely not be at the top of a recipient list for a transplant.
The leading cause of liver transplant is NASH (Non-Alcoholic Steatohepatitis), aka fatty liver disease. And it's strongly linked to obesity, or other metabolic syndromes. Hep C used to be the leading cause (might still be up there), but antivirals have helped with that.

So, I don't think you can push all of those folks to the bottom of the list.