In the case of pickups in particular, which are used for commercial purposes, the vehicles are often not handled very carefully. Leaving liftgates open will damage the liftgate brackets over time and this can lead to costly repairs and vehicle downtime. In addition, the tailgate can fall on objects or a loading ramp when opening. The flap and objects can be damaged.
The flap can be easily unlocked with one hand and no longer needs to be held when opening. An advantage that should not be underestimated, for example when you are holding cargo or bags in your hand.