I don't see how the monopoly argument makes sense considering everyone and their dog is building a rocket startup these days.
I mean Falcon 9 is dead simply because the Neutron rocket will make it obsolete for small sat launches.
And obviously Falcon 9 was never really meant to be a moon rocket either so that is where New Glenn comes in.
Starship was always meant to be a Starlink launcher and everything else was a bonus.