You are. Sit on the other side of the table some time and see how the interviewer lives. Typically the technical interviewers are given you resume 10 minutes before they have to interview you. They have no time to fully read your resume let alone research you. Also note that the technical interviewers have their actual job to do, so even if they did get your resume in plenty of time to do research they might not have had the available bandwidth to do it and their other work.
Just saying it’s just as frustrating on the other side of the table and those of us who have sat there need to be able to give a yes no answer to your skills after only 30–60min. The best way to do that is get you to write some code for us.