I mean, all Worldcheck is for is to check enforcements/sanctions/criminal records from a plethora of sources, it is not made to detect whether or not someone is actually a "real" person (as there won't be any sanctions against someone who does not exist for obvious reasons). For this they will ask things such as your passport copy / a liveliness check / source of funds, etc.
Worldcheck solves the problem of financial institutions needing to go through dozens of several sanctions databases, and continuously updating these (incl. the adverse media results as discuss above). The system is far from perfect, but it more or less does︀ what it is supposed to do. Only that the people who retrieve the data take︁ it as 100% facts and will often not do any additional due diligence.