Out of 60 hits on page one of a Google search using terms “emotional blunting from SSRI,” only one cast doubt on the assumption that SSRI antidepressants exert their treatment effect by causing apathy. The rest endorsed the connection.
The one article I found on this quick search which contradicted this widely held and arguably incorrect assumption is “Antidepressants Do Not Work by Numbing Emotions,” published in Psychiatric Times, Sept. 26, 2022, which was written by George Dawson, MD and Ronald W. Pies, MD.
The authors wrote a convincing rebuttal of the assumption that the SSRI mechanism of action for treating depression is by causing apathy. Based on their review, the problem is more likely due to residual depressive symptoms. It’s a good thing it turns up on the first page of a web search.