Do you object to software repositories that install dependencies precompiled?
Your "lines in the sand" seem idiosyncratic and arbitrary. You are happy presumably to use precompiled software or at the very least rely on software written by others which is already ceding some freedom but then claim that using systems that package all the dependencies into a single runnable unit is too much and cedes too much freedom?
I agree that containers are allowing software projects to push release engineering and testing down stream and cut corners a bit but that was ever the case with precomplied releases that were only tested on a single version of a single distro.