It's because they published
Doctor Who in an Exciting Adventure with the Daleks before anything else in the novelisations. It's an intriguing intro to the series, and certainly the Doctor comes across as being a little less selfish than he was in the TV show (the First Doctor was a selfish prat at first, and it took Barbara taking him down a peg or twenty in
The Edge of Destruction to make him more moral).
And that radio stream worked for me.