People portray early karate as "jitsu," a purer form of the science of fighting, and later karate as "do," following the way or path incorporating a more philosophic outlook on the art. I think karate always had both these two sides. But post WWII karate emphasized the do more as it decreased the jitsu as it spread to the general public.
I see do incorporating some Buddhist and Taoist flavor, but more than just that. For me, do represents a life- style that goes beyond philosophical thought: A commitment to physical fitness, study, perseverance in training, moral fortitude, etc.
This is a problem only when it overshadows karate jitsu, as it did after popularization and exportation to Japan and beyond. I think stress on the do part was to compensate for the loss of some of the jitsu elements and full understanding of kata. There is no reason both elements can't co-exist as long as karate jitsu is seen as the foundational part of the do.