Isn't that the point of bandwidth to be used? Hopefully to full capacity.
No not really. If this were electricity - you may have 200 amp service in your home but you're not going to draw 200 amps continuously, even during prime time. Even if the electricity could be generated the grid cannot support that.
Your comparing a scarce resource to one that is not at all scarce.
Funny, my gigabit router at home doesn't have a meter on it.