I am sorry, but that is a misinformed comment.
German and French subs, in fact the Swedish ones are all very good. The French have the added advantage that they could borrow the design and systems from the SSN/SSBNs R&D effort as well, since Germans don't really operate a nuclear powered sub fleet, so the only tech (albeit a very good one) they have is AIP/Diesel Electric.
Your MoD already went for the German Type 209, so they must have seen something in the Scorpene that they ordered 6.
You can do all you want with the P75I...go completely local or realize that you will need tech and do a JV with HDW/DCNS to speed up the process. Other than ISRO delivering it's payload vehicles, which major Indigenous project is running on time and schedule/costs in India? (Even the INSAS rifle was declared failure, no?)
Here is a very simple question that the MoD needs to ask when dealing with the requests of the trio:
1-What equipment we need and WHEN do we need it?
If the only product/system that they need on time today (clearly, when China and Pakistan will rapidly develop a sizable sub fleet in the region in 10 years)is a foreign one, go for it. Don't get muddled in Make in India non-sense. We saw how that worked with the IAF MMRCA. Or that Arjun failed and you ran to order T90s, why not do it in the first place? Clearly something seems to be a miss.
You wanted the P8Is, you went with the Boeing offering. Simple. Now tell me, if India went about developing MPA aircraft on it's own, would it have gotten that capability at this price and above all, this rapid in service operation? Nope.