How sure are you that our defence industry doesn't rely on Chinese metals or other components. I'm not too sure. We need to build our industry and then go to war with China. China must be taught a lesson for interfering with our affairs and area of influence but that day is some time away.They didn't even want to take on China in 1962 when China had literally no industry worth the name leave aside our dependence on it .
Contrast that with the eve of WW-1 where UK was the largest trade partner of Germany & there was a lot of trade going on between the Allies & Axis powers.
All these excuses are the equivalent of Dil behalane ke liye Ghalib yeh khayal accha hain.