The grain does not hurt at all, IMO. I see this as a fine art photograph, which means the message and feeling it conveys are more important than technical perfection. Photography for advertising, particularly product photography, need that perfection and it is great to have the tools for it. But we should not be intimidated by them and feel obliged to use them to the max when creating images for the soul.
I always try to be aware of what photography was intended to be, a technology to replace painting. That, of course, will never happen. But just as painting has evolved from being as accurate as possible to more liberal styles, including abstract, so will photography evolve to include styles that are more conceptual instead of technical perfect recordings.
