It's also cultural- line breaks, indentations, and parenthesis help a lot to make Mathematica more readable, but there's a strong tendency to do things in one l

It's also cultural- line breaks, indentations, and parenthesis help a lot to make Mathematica more readable, but there's a strong tendency to do things in one liners like you show. Even the official docs are like this. I think even then it can have some readability problems, but it would certainly improve things quite a bit if the community would use a better style.