> run a HTTP server that serves static content in a datacenter
It's not static content!
> I've ran moderately popular websites before and it's zero work most of the time.
I run a service that gets ten million requests on a bad day. There's almost always work to be done.
> Where are all the static HTTP websites that are ran by dozens of people?
Most static websites don't allow anyone to sign up for an account and mutate the content.
> At most SaaS companies, keeping the lights on for the HTTP server is the least work you do.
Most SaaS companies aren't serving a multi-terabyte mutable dataset to billions of people a month. They also aren't dealing with tens of millions of pages of user-generated content. Or a huge volume of legal requests because of all of their user-generated content.
> zealous belief in FAANG overstaffing.
Which FAANG company has only 300 employees?
Seriously, 23 billion page views per day. That's like if each of their employees oversaw a service that got 76M page views per day. That's a quarter million page views (not requests!) Per second. Half a billion pages on Wikipedia alone: that's a few million pages per employee.