I think it’s less about long term practicality and probably more about the coach embedding his ideas immediately . This love reminds me of the early season Emery obsession with Banega, someone who could come in and model his system for other players.
Sarri is in a very similar position to Emery. He is under unrealistic amounts of pressure in a world where 6 doesn’t fit into 4 as far as Champs League places go. And this maths forces bizarre short-term thinking.