Chris a few have mentioned the ups and down of following any club, I get that, it's part of football but actively encouraging something that will increase the likelihood of more downs is weird in my opinion.
On your second point about needing success I'm talking about the club needing current levels of income to sustain itself. Its not rocket science, look at Arsenal since they swapped CL money for Thursday money. In the scenario I'm talking about we have 5 really strong clubs, Newcastle, City, Utd, Liverpool and Chelsea, 5 into 4 doesn't go. One well run, successful club will miss out if they make even a couple of mistakes, Utd are a more recent example of quickly it can go wrong. Mistakes at that level are much harder to rectify, they are a lot more expensive than Bony and Jo, mistakes like Ozil, Sanchez and Ronaldo can cripple a club. Post Pep that could easily be you given history also tells us that legendary managers are very rarely adequately replaced.