Classes/Console/Mvc/Cli/Symfony/Command/CommandControllerCommand.php
protected function configure()
    {
        $this->setDescription($this->commandDefinition->getShortDescription());
        $this->setHelp($this->commandDefinition->getDescription());
        $strict = $this->commandDefinition->shouldValidateInputStrict();
        if (!$strict) {
            $this->ignoreValidationErrors();
        }
        $this->setDefinition($this->commandDefinition->getInputDefinitions());
    }
protected function configure()
    {
        $this->setDescription($this->commandDefinition->getShortDescription());
        $this->setHelp($this->commandDefinition->getDescription());
        $strict = $this->commandDefinition->shouldValidateInputStrict();
        if (!$strict) {
            $this->ignoreValidationErrors();
        }
        $this->setDefinition($this->commandDefinition->getInputDefinitions());
    }
Extbase has its own validation logic, so it is disabled in this place