We're considering this. Tho we want to do an interview with AI to see how they use modern tools, then the rest onsite to avoid many forms of "cheaters".
I guess it comes down to industry. We're on hn so emphasis is on technical ability and in that context what you say is true. I'm in a space that requires trustworthiness is part of the core value proposition so there is little acceptance of outsiders and much emphasis on back channel checks that the candidate is solid. NK fake candidate etc is just not a thing in that context