My personal take is that there are three reasons these stories keep surfacing:
1. Because of lazy journalism.
2. Because it gets clicks when you say a real space mission costs less than a Hollywood sci-fi movie.
3. Because it serves a certain kind of chauvinistic political agenda to say "look how much better / more cost effective we are than those guys".
Again, the achievements of the Indian space programme are amazing β these simplistic cost comparisons just don't do it proper justice.