No where did it say?
The droid was clearly said to "Hover by YOUR side" which it doesnt, it can only be summoned on an enemy unit, also said to "Provide combat assistance", now not sure what your take on that is but I am fairly certain no one thought that meant circle round a creature flashing lights.
Honestly I wouldnt even care if it didnt attack but it sounded at least like a vanity pet.