I think it's just a matter of needing less fuel, which saves weight, further lowering fuel requirements. So it just makes launches cost less. Using the rocket

I think it's just a matter of needing less fuel, which saves weight, further lowering fuel requirements. So it just makes launches cost less. Using the rocket to get off the launchpad is wasteful. It's basically the wrong tool for the first stage but the simplicity of the approach is nice.