The term two-sided medal is about the fact that not everything is as it seems and that it can look very different on the back!
Best example - life and death are also two sides of the same coin! The flip side is the back, which is seen in the turn as a contrast to the partially shiny main page of a page that is beautiful at first glance.
Here are a few links that clarify the term:
In Germany, many employees work less than they would like. The proportion of part-time or mini-jobs is higher in Germany than in other European countries. ► ... The downside of the job miracle!
China's rapid modernization has accentuated existing internal contradictions. The worsening internal problem potential consists among other things in massive social imbalances. The government is now trying to take massive countermeasures. ► ... The social downside of the climb!
The economic crisis plunges every seventh American into poverty. Every fifth child is affected, the least affected are whites and Asian people. Private help alleviates need. ... the downside of the American Dream!