The point is that tyoe is an EXTREMELY vaulable information and if you are explaining code to someone it is very helpful to clearly see what are keywords, what are arbitrary variable names, and what are the types of the variables. For example if you show me a programming language where there is a list object and you write list.one(), I don't know if list is a variable or a keyword, and I don't know if one is a variable or a keyword. Much better to write mylist.one() if one is a default function, or mylist.myfirstelement() otherwise etc.

I mean everyone knows using descriptive variable names is good practice, but then in a coding tutorial it is somehow fine to use foo, bar, a, b, c? That makes things clearer for someone who understands all the types and the syntax, and wants to see the structure algorithm more clearly. It hurts someone trying to learn the language.