는 없잖아요

can't ..., you know

→ 는
phrase Rare #21,739
can't ..., you know Used to emphasize that something is impossible, unavailable, or not the case, often while seeking agreement. 는 adds emphasis or contrast, and 잖아요 conveys “as you know” or “right?”
KO: 그렇게 쉽게 포기할 수는 없잖아요.
EN: We can't give up that easily, you know.

착한 친구들 쓸 수는 없잖아요?

You can't just use good friends, right?

— 엘 시크레토: 비밀의 눈동자 (2009)

쓸모는 없잖아요

It’s useless, isn’t it?

— 잉글리쉬 페이션트 (1996)