There is no such thing as an ultimate Martial Art
If there was, all the special services such as the army, air force and navy plus all the civil authorities would seek out such a Martial Art.
It would therefore be restricted to the aforementioned only, thus making it a closed "style".
When you consider that there must be over 300+ known and not well known martial art styles being practiced throughout the world. You would think that from so many one would be selected, but this is not the case.
Many instructors, sensei, saban, sifu, teachers spend years learning their chosen martial art from their "teacher"; this student, then becomes a teacher, passing over their experience in turn, to his/her students.
Martial Arts, in the Sifu's opinion, is alive, it progresses, it does not stagnate, it moves with the times.
Many students of martial arts, whether they are a newcomer, or an experienced exponent seek out a style that they believe in. It is not necessarily for self defense, many forms of martial arts are learned for their beauty, movement and spiritual "access".
To the first timer, who is seeking a martial art from so many, for whatever reasons, sometimes is left completely baffled, undecided and confused by what they hear and see.
Each school is proud of what they teach and the reasons why it is taught. Therefore, the inquirer will only be told what that school can offer and rightly so, as the "teacher" has spent many years learning and perfecting his or her art.
It would take many years for any student to understand or comprehend what each martial art can offer and that individual would be a long time dead before he / she would scratch the surface to the knowledge that these "teachers" have gained over the years.
So, how can we, as Teachers, become better Teachers? Firstly, by learning more ourselves! Therefore, having more knowledge to answer questions about other martial arts styles from our students, and in doing so endorsing our status as teachers, being able to explain with more understanding what can be offered to a student, no matter at what level, or martial art previously studied, openly and freely!