The problem is not bone density. Your bones are never going to break under your own weight unless there's something seriously wrong with you. The problem is joint health.

Sure, guess I read your comment as bone-focused. That said, joints also do get more resilient when resistance training. Although, I'm aware not necessarily at the same rate as the muscles themselves, leading to issues where the muscles are capable of handling more weight than the joints can happily handle (if we are to personify joints). But, I think that issue is mostly obviated with good programming and load management.