Analogy is completely invalid imo
Petrol in this country is generally all the same, the only differnce is the odd splash of detergent (thats it folks you are paying premium prices for for fairy liquid) and "bad" fuel is generally something that has been contaminated. Supermarket fuel is no different to main company fuel in fact its the likes of shell that supply the supermarkets
Football players however come in all shapes and sizes, different positions, thee are many variables to consider in each purchase
Petrol is almost ubiquitous in its supply levels, you can buy the stuf almost anywhere and at anytime
Football players you can only buy for one month mid season
So whilst one is a simple decision that is easily taken, the other is not.
Therefore Not a valid argument imo