It's simple physics, actual impact follows ability. In other words: you don't ask for a hookup larger than the one that you intend to use because you already pay more per month for that larger hookup.
You could have some unusually heavy usage during off-peak hours and that doesn't require any additional grid infrastructure because there is already plenty of capacity during off-peak hours. Whereas if you want to use the same amount of power during peak hours, that would require more grid capacity, but in general the way to handle that is by charging a higher price per kWh during peak hours, giving everyone the incentive to use less then (and charging them appropriately if they don't/can't).
Total demand for power increases linearly with the number of users. Percent variability of demand decreases with the number of users and approaches a limit of zero.
If we are talking with sizing power infrastructure, capacity required increases with the number of users, but safety factor required decreases with the number of users.
At the margin, infrastructure cost scales with per capita power usage, not with individual variability. The variability cancels out.
That's a pretty big difference in available power for the same price. (5.8~43.5 kW)