Wonderfully off topic (see 'on-topic' at the end)! ....
So at some point in time a lizard laid an egg and a chicken hatched out.
Maybe the chicken/egg one is sufficiently intellectually sophisticated that we don't need to shift to energy/matter!
In a literal sense, it is obvioulsy true the 'the first chicken' came out of 'an egg' - so, in that simplistic sense, you are right in saying that it is a no-brainer. ... the first chicken cannot have appeared out of thin air, or popped out of the belly of some other animal.
However, the more intellectually interesting question is "what came first - a chicken or a chicken egg?", and that is rather different. The decision as to when the progressive tiny changes had progressed to the point of our having 'the first chicken' is obviously a totally arbitrary decision made by humans. The totality of the characteristics of an animal (or any other living organism) is due to a combination of genetic and environmental (and some essentially random) factors. It therefore could be that the first animal to appear which fulfilled the human definition of 'a chicken' only fulfilled that definition because of environmental factors and that it came from an egg which would not, in itself (genetically) not 'qualify' as a 'chicken egg'.
What fun
back on topic ....
Whether by legislation, encouraging good practice, discouraging bad practice or whatever we should be striving to stop these nasty things being used. They are being used by people who believe they increase safety whereas in fact the opposite is true. To me banning at point of sale seems a good idea and should be a hanging offence (Oh Ok then ! heavy fines and imprisonment)
We've debated this before and I, for one, have not seen the data which would enable me to be confident in the same conclusion as you. There are certainly senses in which they (socket covers) decrease safety, but (per the whole concept) there are other senses in which they may increase safety. Whether their use has increased, decreased or had no effect on relevant injuries/deaths (of which there are presumably only a tiny number), I haven't a clue - so I would not be the one to pass judgement.
However, there are bodies around which are much more clever than me, and which have much more access to data than I do. If they were to examine the matter, conclude that plugging these things into BS 1363 sockets had a net detrimental effect on safety, and thus introduce that concept into some Standard or whatever (modified BS 1363 or anything else), then I would be very happy to support legislation which referred to that Standard and thereby effectively outlawed their sale. For politicians to make the decision to 'ban' them unilaterally would, I think, be inappropriate, and a very dangerous precedent.
Kind Regards, John.