Because spec diversity is important from season to season. If output is going to be the same then groups are going to be picked purely based on utility. As a result, there will still be meta groups. I’d rather have output changed to spice up the meta from season to season rather than utility given or taken.
I’m not anti nerf/buff when specs are over/under performing by any means. But output diversity, to me, makes more sense than utility buffing or nerfing.