Klaus The kind of player analysis that is so prevalent on social media today, where people obsess over raw attributes, is basically the football equivalent of racial biology.
Yep, it's a bit like the flaws in a project tender process. You'll get the "statement of requirements" which will include requirements A through Q, then the winning bid will be one that satisfies A, …, Q—no matter how badly it does that.
Same goes for buying a house. If you go in insisting "it's gotta have an ensuite and walk-in robe for the master bedroom, a home theatre, a double lock-up garage and at least 40 square metres of shed space," you'll walk past a dozen properties holistically better than the shit-pile you settle on.
Šeško is that for strikers: he's got the age, height, pace, aggression and ball-striking ability, so there's lots of upside, but there seems to be something intangible that's off about the package considered as a whole. Clubs that don't have a sense for those intangibles or who choose to ignore them don't recruit well.
Speaking of which, it's not a coincidence that some of the problem signings of the Project™ era, such as Jesus, Zinchenko and arguably Havertz, are these "paper heroes" with a good career pedigree and "list of attributes" but bodily or psychological deficiencies that we chose to underrate.