You can fill Yankee Stadium with the number of people at our Req soccer fields on a Sunday. My dd played for 4 years before Fall softball started and she gave up soccer. Two of the 3 years they did not have enough coaches. I volunteered because the teams would have been huge. I never played Soccer. The 4th year her coaches were high school students. At those ages, the weekly commitment was 1 one hour practice (same time each week) and one 1 hour game on Sunday morning.
Unfortunately, I don't think it is uncommon that find coaches is difficult.
I coached with a guy in 10U...a former college pitcher...who walked away from softball and took up coaching soccer. He pretty much started from scratch, but became one of the better youth soccer coaches in the area. I know soccer is a complex game that requires skill at the higher levels, but the concept is pretty easy for even toddlers to pick up. At the beginner level, even the most uncoordinated kid can run after a ball and kick it.
Compare that to array of specific skills and knowledge that any baseball/softball player needs to acquire before being able to do more than just stand there. Catching, throwing, fielding, and hitting a little round ball with a bat...it all can be learned, but none of that comes naturally to anyone but the most athletically gifted kids. Even for someone with playing experience, learning to teach it effectively is a challenge.
Add in the cost difference between a soccer ball and all the gear even a beginner baseball/softball player needs, and it explains how soccer has become so popular in many places.