Rosetta is a translation layer that only operates the first time you run a given x86 app on Mac, and creates an ARM translation that is written to disk and used in the future.
Does that mean it has no overhead?
Also, Rosetta is more like a transpiler, since it basically recompiles the binary, whereas the others are literally layers that basically take calls in one API and translate them to another. They're pretty much the same thing as ANGLE.
It's a one time only cost, since Rosetta only runs the first time you launch an app and the translation is written to disk to be used in the future.
That means there is no ongoing cost by your logic, and Proton translating an API call every time it is used is worse.