Oddly one impact on me from reading this is that Kapwing seems like probably a nice place to apply for a job -- simple enough application process, human review, sane and respectful take-home and no live pressure coding. I'm not affiliated in any way nor am I a FT software developer, but this seemed like a pretty sane process (which sadly the article reveals may not be sufficient to properly vet candidates).
I think this was the whole point of the blog post. As someone else mentioned, this didn't have much to do with AI so referencing AI seems purely like an attempt to capture some eyes for publicity.
I'd actually say that _not_ using AI to prepare for an interview is mistake, putting you at a major disadvantage (and there are plenty of honest ways to use it).
As an interviewer, I'm not testing for things AI is likely to help you with. I want to know how you are going to do the job, and experience first-hand how you collaborate in our shared profession.
You can practice with AI if you want, but it is definitely not necessary. I would much rather have someone say "I don't know that one" (and have hired many people who did), rather than have someone provide some content ChatGPT gave them the day before.
You may want to reconsider. They have written an article criticizing the applicant while posting half of the applicant's resume online. The only hope for Kapwing is if this story turns out to be fabricated.