Most likely no one likes medical instruments, but to develop a phobia ... You must have experienced something really unpleasant that led to phobia.
As about the framing, that counts as much as the artwork, in my opinion. I often mention the frames. Gilt frames are usually used to give the painting a more old look, to place it back to the 18th - 19th century, when these golden frames were a must, so to speak. I always prefer something simple, but at the end of the day, it depends on the painting too. I'm with you on this one though.