Some place else was mentioned the gear head/hot rod mentality.
Give any good guitar player a tuned guitar he can play you a song. Ask him after how he liked the guitar and there will likely be a lot of nits picked over setup, strings, tone, ergonomics, amp, etc.
Give any good cook a sharp knife they can make a meal. Ask them about the knife and again a lot of nits will get picked.
Gear heads are not just into guitars or cars.
If knives could...