Not familiar with the doc you're referring to, but given they are referring to both Local and Cloud Emulation as separate labs, I have to assume this is correct.
Note that such a configuration is definitely NOT supported in production, but for lab/training purposes, you can certainly do it.
Just based on the error message, it suggests that Intel VT is not enabled of the BIOS of the hardware you're running this on.
I know I had to enable this when running VMware ESXi inside VMware Workstation on a Windows PC.
Also note that servers with older Intel CPUs (pre-Haswell) can't be used for local emulation as they do not have the necessary CPU debug/profiling hooks.