It is not unnecessary, it helps the reader building a mental model about what is a function and what is not.
I would concede It can be useful to create some DSL or to access an object lazily but the is a price to pay: a more opaque code base
Parenthesis are not unnecessary in Lisp they're an essential delimiter in defining an s-expression's structure (does not need to be parenthesis but some token is required).
But for me that one bit of syntax is a lot less that the multitude required for many languages.
For something even more syntactically minimal there is Forth.