Sorry. You're correct that outsourcing or ghostwriting is viable. I've just had bad results finding people that know english well enough. But they are certainly better than content generation tools.I think outsourcing is a great option! You just have to know exactly what you're looking for and take precautions before trusting completely.
What do you mean by quality content generator tool?
You're looking for software programs that automatically generate quality content for your social media/advertising?