Why doesn't 'systemctl show --property' verify the property requested and return the correct exit code?

Issue

• BUG RHEL7 systemctl show --property doesn't verify requested property
• I want to show the property value but systemctl does not validate whether the requested property exists or not and always returns an exit code of 0. E.G.
• Where I would have expected to say, "property is invalid/does not exist" and exits with non-zero.
• systemctl --property doesn't validate if a requested property is valid or not, and always returns with an exit code of 0, regardless of whether the requested property exists or not.