Competition can be like a virus, taking the art's DNA and subverting it to its own purpose of self-perpetuation. In doing so, in may incorporate other arts and influences into its DNA, as well as delete elements from its host, as long as it aids in its own self interest.
Many new rules and procedures have been instituted in competitive karate that have nothing to do with the business of kumite, or even kata. Standardization, sanitation, marching up to the ring and exaggerated bowing and kiai's, and spectatorship have become important elements for example. They have little to do with karate itself, but more to do with the self-perpetuation of the competition scene and sponsoring organizations.
If you take a look at video of the old masters, you can see their kata reflects understated power and control, and perhaps a hint of deadliness, but none of them would come close to winning any modern competition. Their forms just aren't pretty enough. Little formality in their starts and endings - just a simple relaxed bow. Often, no kiai's at all. But, katas were not originated to look pretty, or even to be looked at at all by the public.
So the art mutates into something different from the original, with different goals and outcomes. This is, in and of itself, not bad. But modern sport karate should be recognized for what it is - a mutated version of the TMA with its own agenda and self-interests. As long as subtracting original, or adding new, elements from other arts into sport karate aids in its own propagation, the trend will continue.