Your logic is flawed. Background checks are a different beast from active screening like those conducted at airports.
A background check has a fixed list, once the boxes are ticked, that's all, you move on to the next things. While active screenings require you to keep multiple changing variables in consideration, so anything that deviates from the norm stands out.
A common name like John Smith or Ahmed Abdul, would trigger multiple similarities during a background check (hence fingerprint requests and the like), requiring further examination, while an uncommon name would not. If a person has spent all 10 years in Canada, there would be no need to reach out to interpol and other national police forces for additional background checks, unlike someone who has visited multiple countries for longer durations.
