Not true. IFATC uses as many or as few runways as efficiency permits. Specifically for LAX - most of us while controlling use the real-world config of 25R and 24L for takeoffs, 24R only for landings, and 25L for both takeoff and landing. There’s a fantastic tutorial on the community here about controlling/flying at LAX too :)
“For those trying to be realistic” - this is a debate that’s been going on for ages in Infinite Flight, between people who want to be realistic and people who want to fly for fun and convenience. The game belongs to both sets of people, and we have to respect that. For me personally - I like being realistic, but it’s not a big deal to spawn a Southwest at a United gate tbh.
The Casual Server is meant solely for buffoonery. It’s meant for fooling around. I think you mean the Training Server - ATC is not a feature on Casual. And yes, trolls exist on the Training Server at the bigger airports like EGLL and KLAX. Might I suggest creating an ATC Tracking Thread and invite people from the community to fly at the airports you open up, if you want to have a better experience on the Training Server. If you don’t know how to do that, there’s a great tutorial on how to create a tracking thread here:
Again, it depends on the time of day. IFATC are volunteers and can’t control 24x7. We’re always looking for more controllers though, so that this gap can be filled. I would encourage you to apply and join IFATC, so you can open up more airports of your choice on the Expert Server!