Because empathy.

My favorite language writer is John McWhorter, because he has an unabashed appreciation for how language grows and no negativity about it. He also agrees with me (or rather, I agree with him) that the Millennial generation is the NICEST generation ever, kind to each other, instinctively cooperative, and intensely social, so more empathetic than ever. Here he explains why some of the most common language affectations of the group reflect their desire to "soften" confrontation:

http://www.newrepublic.com/article/116161/net-speak-because-making-english-warmer-language