The last entry here is already pretty old but nothing has changed. The problem is still there, ESRI, and waits to be solved!
Closing this as the idea was originally submitted for the Identify tool in ArcMap, and no further enhancements are being made to ArcMap at this time. The Explore tool in ArcGIS Pro provides a pop-up which is the analogous workflow. In the pop-up holding the Ctrl key and scrolling the mouse wheel will scale the contents.
I hope this helps!
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