I think your link is wrong.
Proprioception uses mechanoreceptor just as cutaneous touch does; but proprioceptive recepetors are not located in the skin - they're primarily located in the joints and muscles.
One could also reasonably argue that the different forms of
receptor constitute differing senses. In which case - by your link - cutaneous mechanoreceptors alone constitute multiple senses. I'm not sure that's a useful way of looking at it though.
Fair enough, but I was just trying to show that the senses: touch, temperature, proprioception, and nociception are part of the same sensory system.
They're really not. Touch uses mechanoreceptors, temperature uses two distinct kinds of thermoreceptor (one for hot, one for cold) which produce differing sensory reports, and nociception uses another form of receptor again and pain is quite clearly experienced differently from touch.
But the senses are independent of the brain. Our brain receives the information and makes a representation of reality based on the info it got from its sensory inputs. IMO this is not the same as saying vision is required for balance. The brain compiles all the info and processes it, but that is secondary to the actual, initial sensing of what we interacted with.
Vision is not
required for balance (or blind people would fall over, and you couldn't stand with your eyes shut), it is used to augment it. But goes both ways. Ever got horribly drunk and experienced that sickening world spinning thing? That's caused because the vestibular organs in your ears are giving errant information. Normally the information from your circular canals is combined with information from your eyes to provide a stable image; when it starts being wrong your sense of vision gives you the false impression that the world is spinning around you.