"To me, interviewing falls under the classic Judge Judy comment: If you tell the truth, you don't have to have a good memory. Being a great interview but an incompetent fool at your job probably won't work out too well in the long run. And if your communication skills are so poor you can't interview well, that is also going to catch up with you in the long run."
Terry, if you don't have all such (technical & communicative) shills then you won't be able to through the interview process and it's totally wastage of time. But if really interested, these factors can be taken as a feedback for further improvement.