> You get a result from a call to `foo(bar)`. You have to _do something_ with that result. One common thing you'd need to do is to call another function: _baz(foo(bar))_. But then you're just hiding the assignment inside a baz function call (the result of _foo(bar)_ will be available as a variable/constant inside of _baz_).

Unless the OP is arguing for call-by-name evaluation, which when you take his words literally, sounds like exactly what he's arguing for.