The 10% figure bothers me for other reasons.

Only 75% of people have clean water.

Why would anyone use that figure to argue against expanding clean water access to 100%? Or for rolling that progress backwards.

And if we can't even sort out clean water for a quarter of the globe then it makes sense they're not going to be recycling.

Perhaps more relevantly, nearly half of all global waste is "uncontrolled" so isn't recycled, composted, incinerated or even landfilled (and that's not even accounting for the quality of any of those systems).

So should we give up on landfills, indoor plumbing etc?

It's such a fundamentally stupid talking point, it could only sustained by propaganda.