As a matter of fact I would rather get hit by one ton of feathers than one ton of bricks.
Unless you have melted or compressed the feathers into a dense one ton block of feathers, one ton of just free falling feathers would do literally nothing, even in a vacuum assuming there was sufficient space for them to disperse around me.
And the sand has an even bigger multitude of factors as to whether it is deadly or not. Is it a bag of sand falling on me? Then yeah I would be crushed? If its just a free mass of sand, are you dropping it from a few feet above me? Then yeah, it would probably still crush me. Are you dropping it from 100 feet above me? Probably still crushed, but maybe it could dissipate and I would survive? From 1000 feet up? Yeah I would survive just fine, it would dissipate and cover a massive area if dropped from up there and do nothing to me... As opposed to a one ton boulder, where whether you dropped it from one foot above me or a hundred miles, it would kill me if it hit me.
An asteroid has the same numerous multitudes of factors regarding the damage it would do when fractured versus remaining solid. And in many cases the fractured asteroid would be less destructive than if it weren't fractured.
Lol.