Maybe. Some people really get off on trains. I’m not sure why exactly. I’ve ridden on trains and they’re not that different than busses. (I live in the USA therefore the trains I’ve ridden are basically antiquated, I can’t speak for modern trains).
The degree to which model train makers fetishize these things is just crazy enough to make e believe that some old dude somewhere actually shelled out $200 bucks for a detailed train sim.