I cited an article she wrote in a Blackwell Companion. Please look up the Blackwell Companion series. Blackwell writes major companions for entire fields of philosophy. They dedicate a staff to searching an entire field for the most reliable and recognized experts in a field and then they each write chapters in a text. It is extremely, extremely difficult to write an article in a Blackwell Companion. If nobody 'took her seriously' she wouldn't have been selected to write it.

In addition, all of the articles I linked were in peer reviewed journals. It would be different if they were random things she just put out on the internet or something, but these are serious texts.

In addition, I am NOT a student of Professor Sher. I was asked to write the article by two of her students. I would not write an article on someone I knew personally. I AM a researcher in philosophical logic. I myself am an expert in the field, and well equipped to access significance. 

Etchemendy's arguments were major. Her arguments were the significant reply. Why don't you question the length and breadth of the John Etchemendy article, which cites no links to any work, no academic sources, and only a biography webpage from his office? Of course, I think both philosophers are major enough to have an article in an encyclopedia with several million articles on anime characters. 

I have given a link to a major Stanford Encyclopedia of Philosophy article which cites her as a source, and a book review she wrote that is independently hosted at the University of Notre Dame. I have also removed the references tag. If you have further questions, send me a message.