Unless your application also contains other assets like images etc. Now you suddenly need to package and install/deploy your Go application.
Good times.
Personally I'm not a fan but I can totally see the appeal.
I also found this comparison of libraries pretty good: https://tech.townsourced.com/post/embedding-static-files-in-...
[1] https://github.com/shurcooL/vfsgen
[2] https://github.com/shurcooL/httpfs/blob/master/html/vfstempl...