I don't view motorcycle tires quite the same way as car or truck tires. With those I get quite annoyed if they don't last 60,000 miles or so.
With the bike tires though, a soft compound is needed for maximum road adhesion. Soft compounds cannot last as long as harder compounds.
A MC tire that lasts twice as long as another of the same size with the same loading pretty much has to be made of a harder compound, and therefore is likely to have less adhesion.
When I was heeled over on the Vincent at speed and up very close to the stone wall with my right kneeslider scraping while going thru the 90 degree bend at Ramsey in the IOM this fall, all I could think of was tire adhesion. That and how humiliating it was going to be when the rear end let go and I crashed into the wall in front of about 150 spectators!
So I am OK with soft, fast wearing tires on a bike, in fact I look for them. They can save your life, or at least save you some bigtime embarassment.