TV started soccer when they were in the PAC-7 and everyone in the league had soccer. They also had about 130 kids in a graduating class and now they are down to around 100 in a graduating class. If you assume half are boys that means you've lost 15 boys per grade level which means you've lost 60 boys in your high school since soccer started.
TV usually has 2-3 "Tusky Valley" kids who are hard core soccer players. Then there are usually 2-3 foreign exchange students who play soccer. Then the rest of team is typically athletes who are just looking to play a fall sport. Many of them don't have any soccer background at all. IF soccer didn't exist many of them would likely run CC, play golf or some might even play football.
Here's the thing. Even if only 4-5 "soccer" kids played football it would make a huge difference in the program because it would help field a JV team. Then, once you have a JV team many of your 8th graders going into 9th grade won't quit because they are afraid of being put out on to a varsity field because of low numbers. That has been a huge issue at TV in recent years. Not many freshman (and freshman parents) want their kid on a varsity field.
Having said that, soccer has been very successful at TV. They typically have 20-25 kids on the team and the team typically does well. I can't imagine a scenario where TV would get rid of soccer. I mean they just added girls' soccer 2 years ago even though they had to let athletes play two sports in the same season (volleyball & soccer for instance) to do it.
TV just has a little different mindset. They want to give their kids as many opportunities to participate as possible and they aren't as worried about wins/losses. Some of the other IVC schools are chasing state titles and wouldn't add soccer because it would limit their success.