Multiple filters

[yumyo]

Hi,

to enable to multiple filters (Blur, greyscale, smooth and pixelate) I am basically repeating four times the greyscale example filter. It comes with the following double check if ( ! is_a( $editor, 'WP_Image_Editor_GD' ) || empty( $args['greyscale'] ) )
I am wondering why not using a positive condition like
if ( is_a( $editor, 'WP_Image_Editor_GD' ) || !empty( $args['greyscale'] ) ) so it would be easy to enable all the filters at once.
Is there any specific down side to be aware of?