Track starts v. Swim starts

I'm not sure where this belongs. My apologies if I mis-posted. Maybe it's NSR. I'm baffled by the big difference in the time it takes to get track and swim events started. In swimming, they march the swimmers out, they tear off their sweats and headphones, adjust their goggles, and they are ready to go. Track starts (at least in the sprints) often take several times longer to start than the entire race takes to run. They adjust their blocks (don't they know their settings?), stretch out (weren't they stretching before they were introduced?), stand up, wave to the crowd, do some sort of proprietary one person secret handshake (which often involves salutes, Greek God poses, genuflection and other quasi-religious moves), stretch out a bit more, wiggle into their ready position, etc. What's up with that?