This is not something new Bro there were lots of films premiered that were still running on theatres even in just one week there were some movies premiered like Bala starring Shyam and Kilakku Kadarkarai Salai Starring Srikanth on Sun Network and Not only Sun Network Raj TV too in the late 90s and early 20s played under Velli Minnalgal many few weeks older movies that were also successful and recent instance Kolamavvu Kokkilla aka coco is also pretty new to be premiered.
And moreover sharp in one month New Movies get Streamed via Amazon Prime thats still running in theatres and it doesn't impact Box office run in any away infact now a movie's performance is based on first few days run at Box office and even pre release business decides whether a movie is a hit or not.
Then 1 Month definitely is a longer time and even after TV Telecast the Movie will have it's Intended Audience, in one way it can even boost it for example people nowadays decides whether a movie worth to be watched in theatres just by watching its pirated print, so quick premieres needs to be welcomed and it existed it exists and the sound against new premiere just shows the fear of other competitiors regarding the Network premiering a new Hit movie.
