What's preventing job seekers to come up with their own AI avatar job seeker and use it to attend these interviews?

I ask this question sincerely because I have no clue how such interview goes, and where is the added value compared to just an automated email

The obvious next step is for the companies offering these AI interviewers to also offer AI interviewees! They can get paid twice for a single interview, it'll be great!

For them. They'll still have to burn all the resources involved in generating two audio/video streams, and analyzing them, of course. And someone's gotta pay for that. And they've gotta make a profit on top of that!

The "added value" is that the use of AI tools is being forced by higher ups who are either earnestly gullible enough to believe they'll be an improvement or are cyncically working towards a future of needing only a small fraction of the current headcount.

Obviously you have the candidate show up in person and do the screening in person!