Depends. In cases where the employer offers a HD plan as an option alongside a similar non-HD plan, the employee share of the premium may be set low enough that the difference in premium plus the OOP maximum if you are a heavy user is similar to or lower than the premium of the non-HD plan, so that the employee comes out ahead if s/he is healthy and does not have much medical costs, but is not worse off if s/he is a heavy user.
But obviously, this is not always true, like with what @uwalummom sees which is obviously just a benefit cut.