Bash command unable to read variable argument

Here is my program

#!/bin/bash

command="LVDS-1 --auto --right-of HDMI-1"
main_mon="LVDS-1"
position="--right-of"
aux_mon="HDMI-1"


# Don't work
# warning: output LVDS-1 --auto --right-of HDMI-1 not found; ignoring
xrandr --output "$command"

# Works
xrandr --output "$main_mon" --auto "$position" "$aux_mon"

As you can see if i “split” command into several variables xrandr is able to run the command, otherwise it don’t.

The output error is: warning: output LVDS-1 --auto --right-of HDMI-1 not found; ignoring when using $command