While speed is an option, time matters only to a small percentage of the cubers. For the majority of people, solving the cube is the point.
That's truly a myth. The cube can be solved using just one. Many algorithms are necessary only to those feeding the myth of speedcubing.
Finish the first two layers? Now every move breaks them - and why? That's insane!
Why learn a specific algorithm to rotate edges around a center, when there is already an algorithm (the 'Sledgehammer' that can do everything needed to solve the Rubik's cube, including rotating edges around a corner?
Why learn a specific algorithm to change orientation to cubies, when there is already an algorithm (the 'Sledgehammer') that can do that?
with just the 'Sledgehammer' you can solve it - and without stress.
See how the Sledgehammer works for the by-layer method