His first point is nonsense. The holes are big enough for a screw driver full stop. If I have two screw drivers then I can shock myself. Not only that, its a guaranteed shock because I'm now making a perfect path to earth. Simple fix: dont make the holes big enough for screw drivers. UK plugs are even worse than yankee plugs for this. Aussie plugs fix this problem.
Aussie plugs cover the second problem. The letter nonsense is nonsense. The fuse is dumb, as above, FIX YOUR DAMN HOUSE WIRING. The last bit about your plug falling apart is classic British ideology, stop building things that fall apart.
Its clearly better than EU or yankee plugs, but thats not a great selling point when its still garbage.