where's the harm in that?

Where's the harm in that? — Что в этом плохого? Что в этом такого?

Used when you think that something seems reasonable, although other people may not.

Example 1: I'm only trying to earn a bit of money. Where's the harm in that? (LDOCE)

Example 2: Look, we're just going out for a few drinks, where's the harm in that? (OALD)