Whilst boxing does have many advantages, it does also include many disadvantages. Boxers have to get in close with their hands in order to do what they are good at and toe to toe fighting is where they are comfortable. Our training repeatedly places us in various theatres and we are just as comfortable fighting on the ground as we are striking.
Karate incorporates ranged attacks which allow us to fire off kicks at range before boxers can get in close to strike. We also practice sweeps which can be deployed to knock a boxer over who usually stand in a high stance which is very susceptible to sweeps. Finally, if a Karateka gets in close with a boxer, we will not try to trade hands as this probably wouldn't end well, we would attempt to throw or grapple the boxer to the floor where we would then look to attack from a mounted position or place them in a submission.