This is hugely patronising. We already have a very large professional customer base that includes winners of the Hugo Award, Booker-nominated authors, Doctor Who writers, bestselling authors and many more. Just because I am a lone developer (with a supporting team) does not mean we do not have a broad audience. Far, far from it. It is fine to say that you wish for a different grammar or spell-checker, but it is unreasonable to try and argue for what you want by claiming that we will reach a larger customer base or that Scrivener is for hobbyists only unless we do as you say, when you have no knowledge of our business. Trust me, we don’t need investors. 
Regards,
Keith