Japanese leaves out what English has to say
Japanese routinely drops the subject when it's clear from context. English can't: every sentence needs an I, you, we or they. So translating Japanese to English means guessing who is being talked about, sentence after sentence, and a wrong guess reverses the meaning of a line without producing anything that sounds broken. This is the single most common failure in Japanese to English dubbing, and it's why the translated text stays editable before any voice is generated.
Review who's speaking