Unscrupulous smugglers are a serious problem. But punishing their victims will not help. Desperate people are forced into the hands of smugglers because countries like Canada have built walls with interdiction measures. This issue is not being addressed by the imposition of a 5 year wait. Refugee protection is always contentious because it involves offering protection to strangers.
Genuine refugees have a right to stay in Canada.
Some would prefer that Canada only select refugees from overseas. Landing people without documents encourages people to destroy the documents they travelled on. There is no connection between documents at the port of entry interview and at landing. A person may have travelled with a document, shown it at the port of entry interview then find that it is insufficient for landing. Although Canadian authorities may find it distasteful, there are reasonable explanations why documents are destroyed.