Just because everyone does it doesn’t mean it’s good.
Now, that IPv6 is becoming more popular, and we might be able to provide globally unique IPs for every end device, and that 24/7 connected internet is standard, it should be a thing of 2 or 3 clicks to host a webserver.
It should be a no-op to set up a raspberry pi to serve websites – and it would definitely provide a lot of kids and students the ability to experiment a lot easier.
Remember, Facebook in its early days was hosted from a dorm room at college. Google from a garage.
Their ban on the hosting of servers – despite a common concept in the US, as it seems from sibling comments – is a content concern. They directly say if you wish to do say, you should pay extra for this extra feature.
It’s exactly the "Pay 5$ extra for Netflix on Verizon" concept we all complain about, but which everyone somehow accepts here.
Google Fiber is real internet; 'free internet basics' are an attempt to turn the internet into a walled garden.