Well, they ARE a magical "mutation" of their original species, thus they have to follow the magical rules framework that has been established for 5 editions and almost 30 years.
And lets face it, the animal kingdom is not all sunshine, snowflakes, hugs and kisses. It is a brutal, kill or be killed, Predator and Prey world where you either kill to eat, or are killed to be eaten.... thus most animals (and their magical subspecies) fall into one of two categories:;
They have killing potential.
They have Fleeing potential.
(Fight or Flight)
Which in SR translates into combat or infiltrator... and when we look at the list of known Shifters. only 2 of the 10 are not outright predators (Equine and Bovine), But even those 2 have been known for aggressive temperments among some breeds. (and to be honest, I can't think of the last time someone wanted an equine or Bovine shifter.... )
In short, you want to play a magical race, your bound by the rules of magic. Magic and tech don't mix.