Dancers that are well-rounded, diverse, and technically proficient in their training are undoubtedly the most competitive in the industry.
Exposing students to a variety of styles- ballet, tap, jazz, acrobatics, contemporary, musical theatre, hip-hop, lyrical, etc.- and helping them understand the key differences is essential in building a well-rounded dancer.
For example, a student with tap training likely has a higher understanding of musicality and rhythm, even in other styles of dance. Or, a student with acrobatic training may have a heightened awareness regarding his/her flexibility and control.
Even if a student chooses not to dance beyond the studio, the skills in adaptability and versatility will cross apply to other endeavors.