org-mode tables are great, but they're only easy to type because org-mode does the dynamic resizing and border drawing for you. Markdown is supposed to be simple to type in any plain text editor.
+ Name + Occupation
| Alice | Accountant
| Bob | Baker
| Charles | Car salesman
Headers are easier to make and the last column does not require a trailing marker. It's still some work to align columns other than the last, but that's not a requirement and I'd still much rather have a non-aligned ASCII table than nothing at all.