You seem to have missed out performances in this analogy. Absolutely blinkered, Hazard has probably been the best player in the premiership for a large percentage of the last 5 years (bar the awful season he had). Pogba has probably been the best player in the premiership for about 5-10% of the time he has played in it if we are being very generous.
The points you are making about age, contract, resale value etc are valid but as a footballer performance wise he isnt worth half the figures being bandied about, really he is only worth what we paid for him because of inflation.
If we could get around the £120m being mentioned and more importantly spend it wisely, we should be snapping there hands off.