That would depend on where that is set ...

$this->enabled = true;

will allow the module to show ...

However, if that is just "stuck" in the program somewhere with the other logic settings for the $this->enabled be ignored or overridden by where that is set it could be allowing the module to run when it shouldn't ...

If it is fixing an issue where it needed to be set to true in a particular circumstance then it could have fixed a problem ...