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.
I mean... that is just good design. The main function should be the initializer and orchestrator of the logic. You should be able to look at the main function and tell, at a high level, what the program is doing. It should be usually pretty basic and procedural. Other functions handle the details and complexity.