It is a simplistic explanation that isn’t one size fits all - but the crux is that having an in-house solution only takes precedence if there are none available due to lack of availability. That doesn’t mean we wont look at local development when funds permit, just that its attempts to prioritize.Well it depends on how you look at it. If you want local industry to have capability that is the way.
For example, we have a long history of RF state of art going back to 1950's; there was a genuine interest and it kept going. For your neighbour - I would point you to a simplistic case where your point is not valid - Have a look at ubitx - Farhan's did such a fantastic job. I have many AP ham friends - most cannot even put an antenna together at home. If amateur radio was given credit, there would have been a great outlook.
https://www.hfsignals.com/index.php/ubitx-v6/
For reference above link. I bought his complete component kit and built it out and made a lot of modifications which included power changes to get out to 25w and using 28v. then cased it into a mil-manpack. Kit for 80$.
That being said, this policy has been violated and abused both willingly and through sheer incompetence more often than not because our R&D still has a uniform in charge and not actual SMEs.