Indeed, the fact that it even has to do so is the important bit, and reflects the attitude of such companies (and to a certain extent, the government) today.
An alternate view on the EULA is that it is a legal statement that nobody can get into trouble with any DCMA stupidity if they want to boot their own OS.
Contrast this with the Playstation 2 debacle, where you were only allowed to boot Sony's Official Linux. Which they then attempted to disable / withdraw when it was used to attack other parts of the Playstation copy protection system.
Apple has also provided a way for ARM Linux VMs to use Rosetta2 for Intel binaries. So they are clearly aware of the wants, needs and usefulness of running other OSs. The cynical might say this was only done to support some internal project that uses Docker, but why put in the effort to make it available to everyone?
The current situation does not preclude providing assistance in the future - Apple still hasn't finished replacing all of the Intel products.