It's all about cost of the alternative. We could have kept Diaco, at somewhat obvious impact to the program. We could have hired another novice, at similar cost, but with more perceived risk. We could have broken the bank for someone else, but with obvious financial impact, and with unknown benefit, if any.
This is why some people hate your posts, in a nutshell (not me, at least not always). You offer no alternative, except more whining, and a forward-looking "I told you so"
If Edsall's that [sic] "disasterous," then offer a coach we should have hired, or could hire now, oh Carnac the Magnificent.