That is literally the problem. People resistant to change (willfully or not) don’t want RCV.
No /s required.
Where I live we have RCV for some local government stuff but central government voting is MMP, which works quite well (except in the opinion of our conservatives). TL;DR: you vote for a candidate and also for a party. The party vote essentially sets how many seats each party gets in parliament, the candidate vote is for who represents your electorate.