They dont have to. The admin is basicaly big form field generator that maps values to markdown. So you make field for everything. Dates, checkboxes image selec

They dont have to. The admin is basicaly big form field generator that maps values to markdown. So you make field for everything. Dates, checkboxes image selectors.. Only time they would have to touch markdown is when they would need to format text - article for example. This can be solved by using wysiwyg field instead of md field.