There are definitely advantages to being clipped into, onto your pedals. If there was not then there would be no need for anyone to use them. They have been in use for better part of a century so I will leave it at that. That said modern clipless are used today for the same reason people no longer tie skis to their feet with leather straps. So if you crashed years ago with a bike securely strapped to your feet it stayed that way and tore tendons broke ankles and all sorts of nasty things. Clip less pedals will disengage allowing you to separate from your bike and thus reducing injury. This can be a very positive thing. Yes I speak from the point of experience.