But then you have to think everytime whether you should put parantheses there or not. Is the code readable without parantheses? Should I put them there in case someone reads the code in a year and doesn't know about the problem domain ... ? It is not much, but it is extra cognitive load that is wasted.

It's akin to programming C and everytime you write a function, if statement or for loop you have to ponder whether it looks best to put the opening brace below the line or at the end of it. I hate reading code with an inconsistent brace placement style like that.