Well, I think the general idea is to reduce reliance on foreign components and parts for as much as possible, whether that be China's case or India's case.
Buying an F-16 is indeed more risky than buying F404 engines for the Tejas and AMCA. Although, when we go into the specifics, critical components of fighter jets such as aircraft engines and avionics are definitely more risky to be sourced abroad than, say, airframes and hydraulic systems that are easier to make and fabricate. Therefore, it is indeed imperative for India to seek indigenous replacement for these kinds of components as well - China has been doing that non-stop for more than 30 years now.
As an extra note, this forum is the Sino Defense Forum, and that much of our members have pro-China stances. Therefore, we understood very well first-hand how dangerous it is to rely on imported components that are vital for national defense. Thus, the responses.
