Why are Parameters required?

[DevelopmentVSDevs]

Why are Parameters required?

// ReadRequest fills the request object for the RPC method.
func (c *CodecRequest) ReadRequest(args interface{}) error {
	if c.err == nil {
		if c.request.Params != nil {
			// JSON params is array value. RPC params is struct.
			// Unmarshal into array containing the request struct.
			params := [1]interface{}{args}
			c.err = json.Unmarshal(*c.request.Params, &params)
		} else {
			c.err = errors.New("rpc: method request ill-formed: missing params field")
		}
	}
	return c.err
}

Seems the specification says they are optional

4.2 Parameter Structures

If present, parameters for the rpc call MUST be provided as a Structured value. Either by-position through an Array or by-name through an Object.