Can you clarify what your question is, specifically what’s your goal, what have you tried, what did you expect to see, and what did you see?
You seemed to have a problem with libvirtd-based VMs - I’m assuming you’re using virt-manager to manage these VMs?
It has a GUI to enable automatic network creation etc.
To clear up a minor misconception:
Nope, this is how you enable the automatic startup of the default network(which seems to be exactly what you want, what is your problem with this?).
virsh is just a client tool that connects to a running libvirtd instance, and manipulates VM, network or storage settings.
Can you tell us if your system uses the system instance or a user instance? (Right-click on the QEMU/KVM part in the virt-manager VM list, click details → overview → libvirt URI).
EDIT: Turns out you were quicker yourself. NVM, I guess.