Bcoz star maa and zee thirai have been launched to primarily air native Telugu and tamil regional language films. They can very well accomodate dubbed hollywood movies or launch new channel for airing hollywood movies dubbed in tamil/ telugu of it is viable but having additional language options on english movies is a good thing in either case . Viewers can choose the channel of their choice to watch content , mostly if there is a dedicated channel like UTV Action available for dubbed hollywood films in hindi or if a broadcaster airs such films on its regional movie channels then multi language audio option will b provided for select movies on their english movie channels so that viewership does not entirely get diverted to it.
Audio feeds on english movie channels basically helps add viewers to the channel but in my opinion separate channel does that job more effectively..... as i have said for each regional language broadcasters cannot launch separate dubbed hollywood movies or sports channels hence they work on a strategy to provide such content on existing channels and scheduling depends on ratings achieved for such content
