[malshe]

But you need a counterfactual to that claim, isn't it? If people did not use weighing scales then maybe they would be even more unhealthy.

[pedalpete]

No. If we needed a counterfactual claim for everything, you could also claim that maybe scales made people fat, because we weren't fat before we had scales....

And I'm sure some will take that argument. I'm not running a debate club.