In my Land Rover, everything is very smooth with automatic transmission. I can switch to manual mode but it seems so unnecessary as I can hardly make car goes s

In my Land Rover, everything is very smooth with automatic transmission. I can switch to manual mode but it seems so unnecessary as I can hardly make car goes smoother than with default automatic mode. I think that plenty of power and superb automatic transmission make the difference. Sure for budget cars that lacks power, manual transmission is preferable.