All the risk vectors you list yourself are about physically being able to get the disk. The author states that "growing legs and walk out" (understood as people

All the risk vectors you list yourself are about physically being able to get the disk. The author states that "growing legs and walk out" (understood as people being able to physical access to the disk) is already mitigated by disk encryption. So not only are you not adding anything to the article. You actively try to dismiss that the author has thought the cases you bring up through (and calling them out as narrow minded on false grounds). I think we all would love to see a risk that is mitigated by encryption at rest and is not already being mitigated by disk encryption.