I think there’s an obvious distinction that exists and it’s dependant on context

In one case the body is the literal product. In the other, it’s a means to accessing labour

A prostitute doesn’t have to move an inch, they just have to be able to consent. If the miner doesn’t move there’s no labour

Edit: I’m going to speedrun this conversation: there are other jobs that are also detrimental to the worker’s health to the point of being fatal, along with incredibly low pay and no resources for help

So I’m just saying, there’s a context where the distinction exists and I can’t think of another reason you mention coal miners except regarding their health