Honestly, with fierce hatred I hate that term. It basically means "word 'hacker' sounds cool, so let's make marketing cooler by renaming it to 'growth hacking'". Seriously, just look at the Wikipedia article[0] and see how meaningless this term is. The whole text is just basically pile of buzzwords.
But you're right. Growth is hard, and if you're a hacker at heart, focused on developing your idea/product, someone specialized in "all that murky businessy client-getting stuff" is godsend. You don't want to distract yourself with it, you have better things to do.
I also think that it can sometimes be a way to out-source conscience. You pay the growth hacker to do "the magic", and you don't care what it is that he is actually doing. You can hire one that will do black-hat SEO and abuse social networks without feeling any guilt, by simple virtue of not thinking about it.
But you're right. Growth is hard, and if you're a hacker at heart, focused on developing your idea/product, someone specialized in "all that murky businessy client-getting stuff" is godsend. You don't want to distract yourself with it, you have better things to do.
I also think that it can sometimes be a way to out-source conscience. You pay the growth hacker to do "the magic", and you don't care what it is that he is actually doing. You can hire one that will do black-hat SEO and abuse social networks without feeling any guilt, by simple virtue of not thinking about it.
[0] - http://en.wikipedia.org/wiki/Growth_hacking