Anime with subtitles are that when the audio has not been altered meaning the spoken language remains in Japanese while dubbed anime overhauls the dialog, but lip sync can suck if that detail is overlooked since the source material for the lip sync animations regarding mouth movements as they are originally in Japanese. The thing is, when a character’s name begins or ends with ryu / ryo , they often struggle to correctly pronounce that in the English dub.
If I know the dub is good I would watch that. The same reason non-english speaking television or movies are less interesting; I want to be able to not have to watch the bottom of the screen every few milliseconds.