Requesting information about Kinescope process

[Rinehart]

I am currently researching a book on early (1936-50) American television, and I have in my collection a number of primers or handbooks about television production written at the time by people who worked in the field. In the main they are quite clear, but there are occasionally some things that don't make sense to me. Here is one of them. In his book Movies For Television John Battison notes the compatibility problems between film and video in making Kinescope recordings: different frame rates, and that film consists of a series of still photographs separated by time intervals, whereas video is closer to being one long continuously-created image. Therefore, it is not possible to capture one frame of video with one frame of film without losing part of the following frame of video.
So far, that's clear enough, but then he goes on to say that even if it could be done, it would be undesirable, because the anti-flicker effect of interlacing would be lost. For the life of me I don't see why this should be so. Does anyone have a suggestion? I have attached the relevant page from his book.