It can be learned. Observe:

       //! \brief Transport diagnostic wrapper
       class TransportDiagnosticWrapper {

(Actually, meaningful one-line comments are a lyric discipline of their own, related to haikus.)

You joke, but a tool I have seen lauded for being really "smart" at automatically generating doxygen comments does exactly that. I guess it at least saves the time of a human doing it by hand . . .