seems you're missing the deliberate utter simplicity of what i said - that or you were each adamant we should sign caceido. Caceido was touted by so many as an absolute sure thing with plenty of near meltdowns when we werent in the race with chelsea and liverpool. It happens year in, year out and leads to comments about how terrible we are in recruitment etc. Some people desperately wanted us to get nunez, which is conveniently ignored. So yeah, if you want extra words to say the same thing - there's no such thing as a sure thing and very often players suit a certain system or specific role in a team, then flop badly when asked something different or outside a well drilled comfort zone.
Well, much like us in 21/22, or right now even, almost no one looks even half-decent at Chelsea right now. Maybe Palmer, but no one else comes to mind for me, other than him. That doesn't mean that their players suddenly forgot everything they've learned and practiced about football before joining them. We are also actually a good example of misusing our players after signing them.
Caicedo would likely be doing way better at Liverpool, City or Arsenal, had he joined one of those clubs instead. I think he would be better at United, as well. The same way that I think Hojlund would be on 15+ goals at least, had he joined Arsenal or City and got the same amount of minutes that he's played for us so far (hypothetical scenario, obviously, since that wouldn't be possible due to Haaland at City).
The most important thing for players is the environment the play in. Are there any players out there, who will do well no matter the tactical setup and teammates around him?