The whole "SARM-only" idea is a false promise. Anyone who claims they don't need a PCT or a test base after a cycle is either misinformed or lying. It's an irresponsible and dangerous way to approach it.
This discussion is a good example of why harm reduction is so important. A test base mitigates risk significantly. A "clean" SARM cycle is a myth.
A testosterone base is the foundation of almost any safe and effective cycle. It's a non-negotiable for a reason.