When you want to create a scene you need to do the same config for all individual lights.
You can solve this by creating a group first in order to get the same experience but this is really cumbersome. Especially when creating scenes it would be great if you could select multiple lights and control them all at once.
For example. I have 12 lights in the ceiling of my living room. If I want to create a scene where all lights are set to 50%, but the 4 lights closer to my TV should be 25% and the lights behind me should be a bit warmer you can only do this by setting it per light or by first defining groups.
In the Philips Hue app you can simply select multiple lights and whatever you select will be applied to the currently selected lights. Like you see in the screenshot below:
You could even extend this with other entities, like: Selecting three blinds and click close. Or selecting 4 rooms and set the temperature in all rooms to 21 degrees.