Because that's somehow normal in today's tech world.
We're pretty far from the Lochner era in the US, where even minimum wage laws were held to be unconstitutional violations of a very broad view of freedom to contract. But it is still a principle in most legal system.
Legal contracts for consumers should be written at whatever the prevailing reading level is, and the government should step in the more monopolistic position a company is in.
It infuriates me to no end how preferential government is towards corporations vs individuals.
Dictated but not read,
big company
Alternatively (in emoji description form):
floppy disk, bar chart, right arrow, brain, money with wings, pointing finger, slightly smiling face
You hire a contractor and agree they'll bill you per tile, regardless of how many tiles there are. They bill you per tile. End of story.
For a more acurate comparison, consider a utility. You agree to pay for your electic bill. It's not the utility's fault you invited all your friends who decided to run a crypto mining LAN party, and they can't cut you off lightly because it might literally kill you (e.g. you live in a hot place and rely on AC to stay alive).
How is this the contractors fault?
How is that the kid’s fault?
"No, as one of the top tile layers in the country I can't do that, for your own protection. What if fifty elephants came and wanted to use your bathroom all at once? You'd feel pretty dumb having to reject them instead of me simply automatically adding $1 million to your bill"