Actually, it is just the opposite, chiropractic care can help prevent joints from wearing out! Using car tires as an example, if they are misaligned, they will wear down faster and unevenly. Getting the tires of your car re-aligned will add life to your tires and car. The same is true for the joints in your body.
When a spinal bone is misaligned there is a loss of proper motion and/or position, which sets in motion a degenerative process. With proper position and motion, the joints will be well "lubricated" and should offer a lifetime of friction-free movement without decay.