Agreed.If they are classed as emergency switches then they should be obvious and readily accessible.
Opinions obviously vary. As I wrote above, if one does wish to have emergency switches, my personal view is that they are probably best located 'a respectable distance' from the appliance that could conceivably pose an 'emergency' (but still, of course, "obvious and readily accessible" - certainly not behind the corn flakes and baked beans in a cupboard!).I would say on the other wall is pointless so may as well not bother.
Kind Regards, John