I think most people would be incorrect in their assessment (though, perhaps not ultimately wrong, mind)—with no evidence of how either player (or players) would actually play consistently in the current state of the squad and in the context of our remaining matches, it means they could be very right or they could be very wrong, or anywhere else on that outcome continuum.
My point has been (throughout this thread) that I am not convinced he is the right player for our system, especially given our current defensive weakness on that side (as he has never really shown himself to be interested in pressing tactics or defending in general). Now, he may change all that if he comes to us, but he may not. I have no evidence either way so I only have that weakness—and the general tactics of opponents—to think of when trying to identify a player that may best assist us with our run-in across all competitions. I do think Diaz and Foden could do a job on that side and develop with the team. I also wonder how that money could be spent elsewhere; it’s not my money, of course, but as rich as we are, we do not have bottomless coffers (especially when there are external constraints placed on us by corruption-friendly UEFA).
I may very well be wrong, I will freely admit that, as my overall confidence in either scenario is fairly low. But, again, that is because I do not proport to know that one is definitely better than the other. As I said before, I just do not understand the absolute certainty that he will be successful with us.