Only in that narrow viewpoint. Most people talk about disability in the context of a society because much of what we encounter in our day to day is created by other people. The sights, sounds, smells, and experiences in our world are frequently because of others. So in that context, if the dominant culture makes it a point to create experiences that require hearing or sight to consume, then yes it's a disability. But if we adapt some or all of what we do for people who don't have those senses, then we can make it less disabling.