It was literally like that. I had a script of about 310 lines and the main function was like 10-20 lines of code. I had a very nice Setup of objects that handled all functionality possible behaviours independent and so my main function was just receiving a user input from another function and add accordingly which included like 3-4 different scenarios that are being handled in the main function.
Yeah, always found that weird as a junior. I basically never touched the main-function, because well, it set up some fundamentals and then called some other function or created some objects and then I was tweaking things somewhere below that.
Now that I'm a senior and taking over the lead of projects, I'm the person that touches the main-function and others generally do not. 🥴