Subtitles are useful if they are English. There is nothing shameful in that you listen and at the same time reinforce what you hear by reading subtitles. On the contrary, it is possible to restore those expressions and phrases that you have not heard, missed, did not know or could not restore in context. However, the option of viewing without subtitles can also be useful if you competently approach it. For example, you can review films that you once watched with English subtitles.