Let's take chairs as an example of a fairly common piece of furniture. The function is to be comfortable to sit in. Obviously, looking easy on the eye is also a major plus. However, looking spectacular but being uncomfortable to sit in is a design failure, surely?
As an example, how about John Brown's Welsh stick chairs. I suspect that John would have been amazed (and possibly rather offended) to be called a 'designer'. He just made chairs. Since he'd made a few, and cared about what he did, the chairs he made were both comfortable and very easy on the eye. He did 'design' them in the sense that he selected suitable pieces of wood for each component, shaped them to suit the human form, assembled them in a way that ensured they stayed together for a good while, and finished the chair to make it pleasing to the eye and hand. But he didn't set out to 'make a visual statement'. Design was just part of his craft, not an end in itself. he didn't consciously set out to, but in making a good, functional chair, he made a beautiful chair.
Maybe there's a lesson here. Make furniture (or tools, or lemon-squeezers, or ships) do their job really well, and beauty will often follow almost as a matter of course. Sure, it can be helped along a bit - maybe a moulding to soften a change in width, say - but it shouldn't be the driving force of a piece of furniture. If it is, you may have an ornament, but probably not a useful piece of furniture.