Right I get that in both cases the business can't operate, but if you take an example of a modern web application and a ddos with an ounce of sophistication it can be hard to quickly understand what is happening. So your autoscaling ramped up then you realize something extraordinary is happening. By that time you start trying to stop things at the edge, but some costly damage could have already been done as far as hardware resources or engineering time. Now your spending more money than you would have had to in a normal day of business, and you aren't making money is my point.
The fact you've used computers to magnify the effect of the protest to your detriment is besides the point.
You set up the business, and arranged for automatic scaling ahead of time. This doesn't entitle you to some special protection because you never took into account something like that could happen.
That's the risk inherent to technology. It lets you.scale. Even when you'd rather you didn't.