The other side of the coin noun phrase
Used to refer to the opposite aspect of a subject or a situation
I like wearing white clothes, but the other side of the coin is that they easily get dirty.
Sometimes, I get lonely when living alone but the other side of the coin is that I have amazing freedom.
Working as a freelancer gives you flexibility in work time, but the other side of the coin is that you don't have a stable salary.
Holding opposing opinions on an issue or in a situation
Daughter: So I really want all my friends to have a great time. I was thinking it would be a good idea to have some candy out on the tables for people to snack on.
Mother: Well, if you want them to really enjoy themselves, candy is dandy but liquor is quicker.