That all depends.
I think for the vast majority of drivers/owners that is 100% true.
BUT the likes of Porsche, M3s, GT-Rs etc don't sell to the "vast majority".
In THAT population of owners there are soem who buy for the image - and thus 'Ring times "matter" from a purely marketing/btagging rights perspective.
THEN within that population are owners/drivers who have access to the best roads on the planet and who NEED the grip, handling and acceleration to make a day out an "enjoyable ride"
and then with THAT group of folks are owners/drivers who take them to trackdays, hillclimbs, saloon/gt racing.
This last group ( and a few of the other one ) are populated by lots of folsk who DO these things but can't afford the liesk of Porsche GT2RS, so then seek alternatives giving much of the same and thus why Mazda MX-5 is highly successful/fun on tracks and the likes of the Renault Cup cars etc etc are born. For that group then it helps to decide which cars to look at seeing what it achives on track times.
So, see the 'Ring times are helpful to THAT POPULATION who wishes to use them. An ZERO to 99% of the car buying public.