The problem with your understanding is very basic >>
Our Army is 3 million strong excluding paramilitary with is another 2 million, We have over 1000 combat Aircraft in Our Airforce, We have over 30 Capital ships and over 200 other Combat Ships in Our Navy, We cannot relay on foreign supply ..
We have terrain including desert such as Thar, We have mountains including Himalayan ranges, We have cold areas which are more or same Finland`s -50 degrees, We have jungles same as amazons with highest rainfall in the world, We have to design our own system to survive in our own system ..
We have two seas and one ocean to look out, We have desert to mountains and jungles to defend against China and Pakistan so does Criminals ..
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This is not the case with your country which you are used to, Hence your understanding ..
I have difficulties in understanding your "indigenous" weapon programs. Both Arjun and Tejas.