Because we generaly only have 1 option for utilities, because the government does not allow 5 or 6 energy producers to provide for the same city/township/etc. Since the government creates a monopoly, they regulate the pricing.
We can buy gas from whichever station we choose, meanwhile their supplies aren’t much different, but whatever. It is slightly different with utilities.
I agree though, capping profits is stupid and unamerican. Let them run wild, while we’ll feel some pain for a while, it WILL fix the problem, it always does.