At my practice I work intensively to correct malalignment and inflexibility because research shows that these are the key predisposing factors to injuries and performance limitations (see Research).
Asymmetries and inflexibility in a body can cause:
Cumulative stresses on joints leading to cartilage damage and joint instability
Tight muscular compensations and associated stiffness
Compressed discs, joints, organs, blood vessels and nerves
Poor healing
Dehydration, brittleness and eventually rigidity
Inflexiblility, inefficiency and predisposition to further injury.
Reduced endurance
Premature degeneration
Biased movement patterns
In short, a person with asymmetries is prone to injury and unable to reach their performance potential.