Is fallacy make a argument weaker?

A fallacy is an argument that has poor or inappropriate reasoning, which therefore tends to make the argument either invalid or inconclusive. As a result, fallacies are generally weaker than arguments with concrete logic.

On the other hand, there are times where writers use intentional fallacies (as a cover argument), in an attempt to highlight the opposite of what the fallacy states, thereby emphasizing their true argument. This may be for comic, satirical, or logical reasons.