Quick caveats: (1) Singer is a big name and is more likely to convince people because of name-recognition. (2) Singer is a much better public speaker than most EA advocates.
But working in EA advocacy need not necessarily mean going on a speaking tour. It could mean, for instance, organizing a Peter Singer speaking tour.
RE: lobbying as EA, there seem to be serious low-hanging fruit in EA outreach/advocacy:
See http://blog.againstmalaria.com/post/2013/05/30/The-impact-of-Peter-Singers-recent-TED-talk.aspx
Quick caveats: (1) Singer is a big name and is more likely to convince people because of name-recognition. (2) Singer is a much better public speaker than most EA advocates.
But working in EA advocacy need not necessarily mean going on a speaking tour. It could mean, for instance, organizing a Peter Singer speaking tour.