Do not believe that most other kids have found a passion. Most of them try different things, and their parents keep encouraging the activity they're best at or like better, and the kids just go along with it. That's all.
My daughter started an instrument very young, and tried multiple sports and other activities. The one she was best at was the instrument, and since we kept paying for quality lessons, a great instrument, youth orchestras and encouraged her to do competitions, etc... that has become her "thing".
Does she love it? No! She's fine with it. Big difference. Does she love classical music? She does. Does she enjoy practicing? Of course not. No one, including professional musicians, like to practice. She recently attended a talk with Itzhac Perlman, the famous violinist, during which he shared that he still hated to practice...
But, like any other activity developed to a high level of proficiency, it has taught her work ethic, resilience, teamwork (in orchestra and chamber music), and leadership skills (she's concertmaster of her orchestra). And... a lifelong appreciation for music, which is wonderful.