Of course you are totally correct there of course.But harder compound also helps higher MPG That's why VW fitted them as well as other fuel-efficient cars like Prius come fitted with Ecopias You can't get it all in tyres, there will be a tradeoff somewhere
My previous tyres came off the car at 20,000 miles and over three years.
They bugged me all of the time, but honestly I did not realise how noisy they really was until I changed them.
To have such a silent drive train that is then compromised by noisy tyres appears to defeat the object altogether in my eyes.
The small reduction in MPG is a small price to pay for a much better place to be in the cabin.
Arhhh ...... Peace at last. LOL.