Everything has an opposite side to it. There are a million reasons why you should take something because you love it and not everybody that takes MA has the thought process of using it for self defense some people just enjoy the workout. Some people take it for the art alone and not for the reason of ever using it. Most people that are experiencing major pain with the knees or whatever would probably not say they love it anyways. We could go round and round over this but the simple fact is that the question asked is that if you enjoy doing something does it matter what the style is and the answer is no. Every MA has something and it is up to the individual what they take from it.