The Internet is interrupted more often because of math. Systems administration has undergone the same “industrialization” as physical factories, and is therefore equally cheap, but also equally brittle.

To demonstrate:

If you have 10k carpenters working a chainsaw, you are unlikey to ever have 0 carpenters working a chainsaw, but you will regularly have less than 10.000 of them. Some will be ill, on vacation, quit their jobs, working slower because they slept too little, etc.

If 1k carpenters are represented by circles, your 10k carpenters would look like so, at any time:

🟢🟢🟢🟡🟢🟢🟢🟢🔴🟢

This is inefficient, as you do not have entirely green circles. Also, each circle is only green for 8-12 hours, per day. It is also ineffective, as you have to pay for the carpenter, even when he is not working.

If you replace all of those carpenters with a carpentry robot, that does the work independently of human action, then that robot will look like this, at all times:

🟢🟢🟢🟢🟢🟢🟢🟢🟢🟢

…except for when it is out of order, at which point it looks like:

🔴🔴🔴🔴🔴🔴🔴🔴🔴🔴

If it stays like that for very long, you will begin running out of cut wood. It will also not be possible to simply call the carpenters back into service, as they are all gone: retired, in a different job, out of the country, deceased, etc. Besides, they’ve long since sold their saw. If the machine is down, it simply stays down, until it is fixed.

If the factory burns down, there is no Penicillin. All Penicillin, in the entire world, was made on that factory line, in that one factory, and that is now simply over.

If the server goes down, it simply stays down, until it is fixed. There is no (experienced) system admin to call for help, because they have all left or been escorted out of the data center. There is only one robot–babysitter, left staring helplessly at the electronic dashboard covered in red dots, waiting for help to arrive… from somewhere.