Yes, but they said "Render VRayMtl and VRayLight without conversion (even if V-Ray is not installed!)".
Yes, that's true. But the assets need to be created using a specific version of V-Ray. If they are too old, it won't work.
Imagine some 3d application, which can open .max files. It could work with files saved with 3ds Max 2019, but might not work with those saved with 3ds Max 2008.
But this is a very important point that will mislead users. How do I understand what version the model should be if it is not mentioned anywhere?
I have thousands of models from Vray, and all are made in different versions. How in this case to understand what the Corona understands and which does not?