Depending on the size of the peak, overloading your base load could very well grind it to a halt. At times of overload, you need loadshedding to recover, which is exactly the opposite of what you are proposing here.
I guess that depends a lot on the specific scenario and use-case.
What use case do you have in mind? In my experience every use case I can think of won’t work with your model. The diurnal variation between nighttime demand and daytime demand (in a given timezone) is too great.
I'm kinda not interested in this bad faith debate, but I'd like to call out that I perceive it as such.
loadshedding is based on each load having an associated priority