Those that wont smooth the sand will not do it whether hitting the ball or picking it up and chucking it out. If I go in to pick my ball up I will smooth the sand as I leave, same as previously I would always rake.I disagree.
The default is we play out of bunkers and rake it.
If rakes are taken away there should be a blanket rule that bunkers are either out of action or, just do what we used to do and smooth it properly with your foot.
So you get the groups who want to just chuck the ball out when everyone else is playing as it lies... Are the guys chucking the ball out going to care about their footprints? I doubt it.
You can't have some playing properly and others just marching in and out the sand with not a care.
This is an entirely different issue to whether it is necessary to hit out of bunkers upon golfs return, it is about courtesy and applies to smoothing sand, repairing pitch marks, divots etc.