You're right - the format doesn't show up outside of school. And if we were being bombarded by 5 paragraph essays in the "real world" then we'd certainly have a lot of justification to this entire thread. But we don't. You just proved it. So what's the issue here?
(See also our math curriculum's ability to convince people that "=" is not symmetric by the repeated hammering of "1 + 4 = ___"; we think we're teaching them math and using "equals", they're learning that the "=" symbol means something more like "simplify and reduce" and that it has a direction. Grab three random people with the "usual" math education (i.e., not programmers), and see if they will agree that "1 + 3 = 2 + 2" (you may need to put an underline under the 2 + 2); I think you'll find a lot of them insist that is "wrong" and the right hand side "should/must be 4". And that's just one example.)