I agree with most of the answers. Clearly the added stress to proximal joints (hips and shoulders) and the lower back outweighs any possible minimal increase in osteogenesis.
One point I didn’t read was the benefit of walking up stairs or walking up hills. Just have you clients be care as the eccentric load on leg muscles is much greater than going up. I’m sure you’re aware that it’s the eccentric phase of movement that is most responsible for delayed onset muscle soreness (DOMS.)