RCV is just a rebranding of the proportional representation movement, which has been around for several centuries. Some countries and U.S. jurisdictions have tried it, but later abandoned it. RCV essentially eliminates the ability of an advocate of political reform, such as MAGA candidates, from obtaining electoral victories. We saw that in action during the 2022 Alaska U.S. Senate election.
Asa Hutchinson and other "moderate" Republicans see RCV as a means of staying in power. The GOP voter base has been steadily voting them out in the Republican primaries. Enlisting Democrats and centrist leaning independent voters in an RCV scheme is the tool they see to avoid the single party primary.