the (other|flip|opposite) side of the coin

a different way of thinking or approaching a situation

The idiom "the other side of the coin" is believed to have originated in the 17th century. It is thought to have come from the literal meaning of a coin, which has two sides. This expression came to be used to describe a different or contrasting perspective on an issue or situation.

On the one hand, going to college can be a great way to advance your career.On the other side of the coin, it can also be a very expensive investment.
While exercise can be beneficial for physical health, the flip side of the coin is that it can also lead to injuries if done improperly.
Technology has revolutionized communication and access to information, but the opposite side of the coin is that it has also increased our vulnerability to cyberattacks and privacy concerns.
Living in a city offers many advantages, such as access to diverse cultures and entertainment options, but the flip side of the coin is that it can also be more expensive and crowded than living in a rural area.