Which they apparently are for Spain, so good news!
Just because we had a mad race in Canada last year it doesn’t mean we’ll have won this year. The Pirellis aren’t dying quickly because they’re an inferior product, but because they have the tyre construction equivalent of a time-bomb in them. We’ve had four very different races so far and the tyre wear has been pretty much the same in terms of the number of laps.
In answer to the actual question, they’re taking the two softest compounds because, ironically, the tyre wear isn’t that great at the circuit. It was only that great last year because it had been two years since the last race and if Bridgestone had brought the right compounds it would have been a normal race.