Thanks for asking.
I will explain some use cases.
Pantry - Butlers Pantry etc.
Let say we are using the my sensor light blueprint to control the lights in the kitchen. We then have a pantry with some lights. We install a contact sensor on the pantry door.
Now we use this blueprint using the pantry contact sensor as the trigger. When the door opens the light turn ON and it will turn OFF in a given time delay, so we don’t need to close the door. When we close the door if the light is ON the light turns OFF. So we can see it works different to the Sensor light BP.
Easy, now lets take our automatons to the next level.
Let enable the ‘Motion Sensor Option’ and add our motion sensor we use in the kitchens sensor light BP automation. As we enter the kitchen our kitchen lights turn ON. We then start preparing meals etc. We open the pantry door and leave it open. The light stays ON now due to the motion sensor being active. We can go in and out of the pantry and the light is ON. Now we leave the kitchen, the kitchen lights are ON and the pantry lights are ON and the pantry door is open. The motion sensor clears turning OFF the kitchen lights and the pantry light. Nice. We come back into the kitchen and all the kitchen lights turn ON including the pantry lights. Nice. We then close the pantry door and the pantry lights turn OFF but the kitchen lights stay ON until we leave and the sensor light BP turns the kitchen lights OFF.
If we used the sensor light BP for this along with a contact sensor you would have to close the door for the light to turn OFF and all of the above scenarios would not work.
How many times do the kids/me open the pantry door and not close it? It keeps family peace as the lights always turn OFF even if you leave the door open not to mention it takes you house automation to the next level 
Closet
Again same thing as above but in a bedroom. Sensor Light BP in the bedroom turns bedroom lights ON, open the closet doors (door contact sensor) and the light turn ON. Use the motion sensor option and you can walk out of the room with the closet doors open (contact sensor active) and all your light will turn OFF due to no motion in the room. Walk back into the room all lights back ON. Close the closet, closet light turn OFF.
How many times to the kids/me leave the closet doors open? Family peace, don’t need to keep telling the kids to close the closet doors
Hope this all makes scene and gives you a better understanding on why it was developed. Sensor Light BP can’t to this.
I also have a 
Manual light control with auto OFF. This works with your lamps you manually turn ON if needed. It will then turn them OFF for you in a similar way as this PB but the trigger is different. Check it out as this to makes your automatons smarter.
Blacky 