When creating an SNMP template you set the device type to e.g. "switch". Now you would like to add a SNMP device and apply the template. For that you have to manually add the template onto the device.

It would be very helpful when the template would be applied to the SNMP device directly (if equal device types then apply template)

Else I don't get why there is an option to choose "device type" when creating a SNMP template because you can enter a name and description as well.