Who cares really...
Some idiots like you might not care. But those who are doing the ground job of taking bitcoin mainstream, do care.
...
That was quite a success. How many people do you figure bought bitcoins because Microsoft started accepting it? One, two...three
thousand?
FTFY
Dont forget the media effect that started when Microsoft started to accept bitcoin. It might not make any difference to drug addicts. But, for wage slaves in mainstream world, brand Microsoft brings in a notion of safety.