You -- fallible you! -- are not immune to propaganda.
Being able to understand the ulterior motives at play in advertising and PR more broadly does not absolve you of being caught under the spell. I had trouble reconciling this for a while after getting turned on to media criticism outlets, e.g. Citations Needed podcast[1]. But it is important to stay humble and remember that you are still a bag of electrified proteins that reacts essentially the same as other bags of electrified proteins, and so are subject to essentially the same forces.