The device will tell the charger how much power it wants. The charger will tell the device how much power it can provide. What do you think will happen when 3 devices all start talking over one another? If you connect a laptop and a camera, then either the laptop is going to take 3 days to charge or the camera in in for a fun ride.
“Why don’t reputable brands sell Frankenstein cables?”
The device will tell the charger how much power it wants. The charger will tell the device how much power it can provide. What do you think will happen when 3 devices all start talking over one another? If you connect a laptop and a camera, then either the laptop is going to take 3 days to charge or the camera in in for a fun ride.