No and that's my point, 4K is not the norm yet. Most houses don't have 4K TVs, let alone 4K monitors or the hardware needed to access 4K streams (or don't want to pay higher subscription costs for 4K programming), which is what makes your usage an outlier. That means there is plenty of time for the technology evolve for the demand where 4K is 'normal' usage in the next 5-10 years, hopefully meaning we won't live in a world of bandwidth caps.
No doubt the average monthly household bandwidth usage is much higher today than it was 10 years ago, but there's no way even 200GB is normal. In fact in many cases it's probably not even possible due to slow internet speeds.