Talk is not an interruption. Talk is foreground listening.
Music is background listening or audio wallpaper.
Talk stations work for advertisers because their commercials are regarded as an information component and come across as part of the information flow. Especially live reads which are perceived as an indirect endorsement by the presenter and therefore more attention is paid to what is being advertised. Listeners are loyal to talk radio. They relate to the station and befriend the presenters. Talk radio is a high involvement, intrusive and interactive advertising medium.