sunny d, I think there's some cognitive dissonance at work here. The purpose of motorways is to get you from A to B faster. Accidents en route are accepted as a possible side effect.
But the purpose of hard shoulders is different: they're to keep you safeg. Accordingly, if they're death traps too then they've failed - whereas if somone's killed on the motorway itself, it's the drivers, not the planners, who have failed, even if there are more such accidents than in the "safe" lane.
In terms of saving lives, I'd sooner the hard shoulders were kept even if it does slow traffic down; show traffic is safer traffic.