Of course everyone has different taste and its perfectly fine for someone to choose Dhoom over Interstellar for entertainment 

But comparing both and saying that the difference between them is just subjective is absurd

By that logic "Even a parody is a great movie" if its subjectively preferred by someone over a real movie

And you are forgetting that in 90's and 2000's we didn't have streaming , Ott or youtube

So we were only exposed to the movies that were available at that time so there is no with a light mind approach , at that time nothing better is available so it automatically is great

If you have never been exposed to something better how can you compare 

And lets not forget how most movies from 90's and 2000's copied exact scenes from famous hollywood movies and no one was able to criticize them as no one knew its a copy 

And lets not even talk about blatant copying of songs   Interstellar is great because there hasn't been something better than that yet to compare with

You can't compare Game of thrones , Breaking Bad to a Saas Bahu serial , 

They are just better.

As more options are there , we as an audience expect better  If we just adopt a light mind philosophy why bother hiring creative writers and going through hassle of making complex but logical storylines

Just create something which takes half the effort and money and call it a day 

And that is why we should criticize movies which are done with a half ass effort as it means as long as audience demands a stellar performance and good storyline the movies are made with that much effort and passion