I'm curious to know what sports you do play, and whether you compete in AAU/USSSA/etc. I think there's often a higher level of commitment required among 4A athletes if they want to actually play for their school's varsity teams, which is what I think drives a lot of kids to specialize in just one or two sports. The best athletes can be good enough in some sports to still start without specializing in those sports (Tyus Mason at Valley in basketball is one of the most recent examples). But a lot of kids fall behind their peers if they don't focus more on a particular sport. You see a lot less of that in smaller schools.
In some ways, I specialized, but not at the expense of other sports. I played baseball, football and ran track, and baseball was always the one I cared about most and I put in a lot of extra time for that (my dad was the coach, so I hit year-round and did a lot of work on my own to get better). But I still worked hard for football, and I ran track to help me for my other two sports (why every athlete doesn't run track and/or wrestle is beyond me; either one helps an athlete in other sports, especially track). I was a lousy wrestler and basketball player, so I'd dropped those sports by the time I hit high school.