Your charge against OS that it gives no actual reason why women cannot be ordained is totally false, in fact I doubt that you have even bothered to read the document with the open mind you claim to apply to all the Church's teachings before you decide whether to reject or accept them. All your objections to OS and subsequent documents are reduced to, 'women can't be ordained because the pope said so', and you expect people to take that as Gospel just on your say-so. There is now no reason to investigate further because John Hobson has pronounced upon the matter.
The dubia posed by the Cardinals are legitimate questions of vital importance to orthodox Catholics, that is Catholics who look to Christ's Church for guidance rather than secular 'wisdom'. The Pope's problem is that to reveal his true thoughts might leave him open to the charge of heresy whereas as long as Spadaro, Kasper, Schönborn et al 'speak' for him 'semi-officially', he can walk away.