I don't know from which source you get your sales figures on 222, but as an RFD, I have not sold a 222 for 8 years now, I have however sold a large number of 223's.
Secondly, I did not say that there was anything wrong with the 222.
Thirdly, as I said, there is a far better selection of ammunition for the 223, which in itself is a good reason to buy a 223 rather than a 222. UMC for example list 4 loads for the 223 and none for the 222, Remington list 3 for the 222 and 13 for the 223, Lapua list only one 222, and that's a FMJ. Winchester list 1 for the 222 and 7 for the 223, need I go on?