Sorry, don’t quite understand what point/comment you’re specifically pointing to…?
It’s hard to find “guarantees”… you’ve just got to try and set yourself up in the best possible way, be as “prepared” and have researched as much as possible in this context…
No one can guarantee we won’t make another bad/failed signing but we should, hopefully, increase the probability or percentage of likelihood that we make successful and top quality signings…
Purslow wasn’t solely or massively responsible for many signings, Suso and Lange have been given plenty of criticism too
From what I’ve read in the past, Purslow did make some gaffes… such as going for Drinkwater when Suso wanted N’Zonzi… played a big part in the Barkley (initially looked a masterstroke but turned sour quickly and failed miserably really)… and, of course, was responsible for the clown we had in charge before the master we now have… but he also did a lot right…
No one’s flawless (except maybe Unai ) but you’ve got to be diligent and work hard to make good decisions… not lean on your own ego or status but put the necessary graft and research in…
Dunno if any of that made sense
Sorry