Many martial arts have become sport.
Instructors are now 'coaches' and the whole approach is geared towards competition.
There is nothing wrong with this, if this is what you want to do.
However, strictly speaking, such practice constitutes 'sport' not 'martial art'.
The mandate of sport is quite different to that of a martial art.
Sports are about winning and losing, gaining trophies, medals and awards.
At its most crude, a martial art is simply about surviving a violent assault.
At is most refined, it is about attuning yourself to the way of existence, adjusting to the rhythms of life.
No sport can offer this.