Right exactly. Which is why the RSx20 models are recommended if someone wants the simplest solution possible.Some additional details:
The RSx20 has an additional HDR mode (not just the ST2084 HDR curve). The distinction is important, as if you create a custom HDR gamma curve and select it in the HDR mode, that custom curve will be used automatically whenever an HDR source is detected.
In comparison, the RSx00 only has a “Gamma D” curve, which the projector will use even when you prefer the custom curve.