The EU (or, to be correct, certain Governments of EU) indeed wants to stop certain people from entering the EU. In their vast majority (if not all of them) these unwelcome individuals will have nothing to do with the new ETIAS, they've been obliged to have a visa for a long time and will still be for the foreseeable future. Which, of course does not mean that they nevertheless manage to enter the EU, much the same way that neither visa nor ESTA managed to reduce illegal immigration to the US. So, the ETIAs is certainly not meant to be a European version of... the wall
