Yeah, I tested this by buying land to the left of that image and adding in a cargo train station, problem solved.
But putting a station/tracks into a 2x2km sq takes up valuable space, and industry needs uneducated people which means you need residential areas that won't be maxed out cos there's no schools, so won't house as many people.
I think housing and offices only would be the way to go. Even then I don't think you'd get much over 50k, so I'm not going to try again, back to building a normal(ish) city