What my question would be is not "why does everything now days seem to have bull in it" but why does everyone make so much of a fuss of what other people are crossing their dogs.
As long as you have what you want in your kennel then what does it matter what anyone else has in their dog, folk could have giraffe in their dog for all I care. And if your concerned about the original lurcher becoming extinct then start breeding your own line.
Everyone has their reasons for why they put a certain breed in their dog, let them get on with it, and until they are forcing you a gun point to put