I agree to an extent. However, Nikki Haley, like so many others, does nothing at all lately except carry Trump's water. There aren't too many politicians that are able or willing to pick up the full Trump hate platform. They ride on it when Trump is running it, sure, but outside of Miller and the head of the neo-nazis, nobody else even wants to run the full Trump platform.
And when Trump is gone, someone else will take over the GOP and swing it slightly in their direction. Haley would try to passify the deplorables, but she wouldn't implement most of their platform. Some of this shit even made Jeff Sessions pause. Think about that for a second. If racist Jeff Sessions is pausing, however briefly, because racist tactics are going too far, then they are going to be hard pressed to find a Trump 2.0.
Nobody else can combine showmanship with a platform of pure hatred, while also being narcissistic enough to focus on the grifting aspect while not giving a shit about running a platform of hatred. The true believers aren't showman and aren't likable even to the hardcore Trumpers.