Stuff deteriorates over time and with use, like filters and oils. There's a difference between maintaining a car and looking after it, un less its a car I'm not bothered about or have planned major work then i would want to know that its previous owners have taken pride in it, not just the bare minimum of what the book says. Hence why on my cars I've always replaced stuff with genuine or superior parts, when it wants doing, not when it needs doing.
I'd rather know that my car gets the care it wants and a little bit more.
Growing up with cars and engineering i know if you care for stuff your stuff cares for you.