Those are just paradigms, ways of solving problems. There’s a difference between familiarity and readability. Sometimes you have to learn stuff before understanding them. Readability is how easy it is to do that, given familiarity with the base concepts that the code use.
Yet it's pretty easy to find people who consider that `map()` or `filter()` are simply not readable – or, on the other side of the aisle, that having a loop variable is detrimental to readability.
And of course, these criteria change with time, industry and programming language used.
