Be angry then, IM communication is not a contract with terms unilaterly decided by one party. Or put a confidential signature with every message, see how well that works for you
Be a better person. Or at least put a message in your status that you record everything and send it to Google for analysis for minimum personal gain. Do you also carry a second phone to take a photo just in case someone sends you a disappearing photo?
google? signal desktop is not on android, is it? no, its on a pc, as could be a local llm. did i even say i did this before you wanted to assume that you are a better person because what your preferences should be universally obeyed?