I guess that is a good summary.
It's more important if you are doing things that need a switch management IP address such as 802.1x and RADIUS.
Typically I use VLAN1 for the guest VLAN. Then if you plug in a Meraki device it will be able to connect to the cloud and come online. If it is a switch and you have this configured as the default for switches network wide then after it comes online it will automatically moved to the trusted VLAN, and RADIUS will be able to work.