Maybe if you already won the Tour you can treat the Vuelta as a camp for next seasons... but if you missed out on that one you just shouldn't, in my opinion. And then there's the thing that they have so many possible leaders who deserve better than some non-support / or getting their spot taken from them by someone who hasn't prepared for this at all.
I guess it shows that Pidcock is really important for them, probably because of his talent and also his nationality, but first I wonder how much Pidcock can actually take from this if he's not in form.
Of course, if the result is "I wasn't really prepared and it still went amazing", okay. But if it doesn't go so well he won't know if it's because he has problems with three weeks or because he wasn't prepared properly.
-> With Ineos having so many great riders I don't really get why they had to push for Pidcock to be here. Or he was just keeping expectations low.