If it was 5-10 movies then I would've agreed but a career spanning 42 years & 100 films with 3 all time Industry hits, he has earned his fame & position. Of course Nandamuri family goodwill will always exist but that alone cannot discredit such a long career.
And it's not just Katrina & others... right from Mandakini, Meenakshi Seshadri, Divya Bharti to Tabu, Raveena Tandon, Sonali Bendre, Shilpa Shetty have starred as his heroines.
Sadly, both the times he starred with Sridevi, she played the love-interest of his father, NTR Senior.
Anyways, his political career can be owed entirely for him being the son of NTR.