If the aim is timely availability & sustenance at all times including during conflict , then its only a minor issue. Whether a platform is IDDM or what make or what is % of indi content that is relatively superficial stuff good for PR value but in battle its a zero sum game. My gear should be good enough to counter the adversary. This is primary objective for the use case.
Next is the industrial capability enhancement part. It is always good to have it sourced locally while feeding on a global supply chain. Every single country do that. Idea should be on value addition, how much our own domestic industry can create value wise so the business that would traditionally go to foreign OEM/foreign market instead shift to us based on certain usp be it quality, cost , time of delivery, ease of business (subsidy, attractive financing etc) such factors. Without a demand the business can not grow.
Once it start growing the foreign OEM would also get more return on its investment here. Subsequently it may prefer to part shift some operation that would normally go to a third country subsidiary in another region to India so it can meet demand in the geographic region we are in. This in turn help in expansion , a greater supply chain growth, long term tech support & available expert workforce to cater for market demand. It can even create new customer base.
When Indian companies want to venture into foreign market, they also have to go with channel partners local company to gain entry into a foreign market. Overall total addressable market is always big but large part of that remain out of reach unless one venture out by following respective country specific norms, roles & export control mechanism, certification of product & manufacturing practice. Rest whether you call it IDDM or local produce ie IP generation part, to get to a stage of IP generation can not happen suddenly. Either you license a tech from your domestic sourcing & turn it into a viable product good for global market, this scaling up need years of expertise. or you can build something from ground up. New technology or IP is generally the theory part, scaling it into some usable product itself take considerable time , expertise & marketing, else the market demand would not arise at all. it is good if Indian manpower can do that or need to build up over time.
So for a short to medium term period, it is beneficial to build up & shorten the industrial gap that exist with other countries vs India. After small leap then the jump can happen. This is what the message is from various Industrial & commercial think tank too & it has some weight.