I had to work in a very large python codebase before I started to realize how helpful strict typing can be. But for quick and small programs, I do enjoy pythons

I had to work in a very large python codebase before I started to realize how helpful strict typing can be. But for quick and small programs, I do enjoy pythons relatively loose typing. I wonder what kind of application I need to try, before I realize the advantage of flexible typing in a database. What happens when I take the mean of integers and strings? Won't I be surprised when I my sum of integers return a real number?