I don’t know the details of that situation, but I have been on the other side of that debate.
People say “it’s a one line change” (once they argued it was a 1 bit change!). But lacking a fully controlled and hermetic build system with its own exhaustive test suite you can’t be sure about the relationship between the source and the binary. And that continues to every step to get the binary into production (updating existing devices, etc).
Welcome to Tradeoff Town.
Sure, your ultra paranoid checking of everything might catch an extremely rare bug caused by something like interactions between a benign code change and a build system. But is it worth slowing down the development process by that much?
Is it worth missing out on an entire generation of technology, like what happened with US and the shift from 00s drone warfare and 20s drone warfare?
Usually not.