Well, afaik most SQL dialects, drivers and programming languages support parameterised and prepared statements... Has there ever been ANY reason to use string

Well, afaik most SQL dialects, drivers and programming languages support parameterised and prepared statements... Has there ever been ANY reason to use string concatenation instead of parameterised / prepared statements? I think there should be not one single tutorial explaining sql with string concatenation... And why is this feature so often not working for identifiers like table names? I would love to hear opinions to that...