I'm not sure I follow where you feel this is "throttled" as it seems to be just a very limited heat item by design. It is rated for 1700 watts max by looking at the specs on the plate.
Consider that a common toaster is often in the 1500 watt range and you have a bit over a normal toaster . Say two very low power toasters at 850 each and you get the same heat?
The idea of the low heat is that they want it limited to avoid burning the house down!
The normal 8.5 inch stove burner is often in the 2100 watt range so this is not designed to give nearly the heat of a normal stove.
I might expect this to be for keeping a couple coffee pots hot in restaurants, etc.
Sorry, I see no safe way to retrofit for normal cooking.