At busy airports you have little choice, but at least you have ATC to coordinate things. At uncontroled airfields the prospect of meeting someone going the wrong way because they have deceided to orbit rather than go around is dangerous and unnecessary. What ever type of airfield you operate from, instructors should brief their students accordingly and make them practice all manoeuvres they are likely to have to do before ever sending them solo. That is why we have Restriced FIs, so that they learn all the necessary skills before being let loose to send students solo.