You asked: "I wonder why this is the standard. RCA and phone plug interconnects are all male-to-male."
The answer is that it makes it nearly impossible (without significant effort) to connect an output to an output or an input to an input. With RCAs, anything's possible.
The answer is that it makes it nearly impossible (without significant effort) to connect an output to an output or an input to an input. With RCAs, anything's possible.