So you read something insightful and thought-provoking, and then realised that the words you read had been generated in a way that you don’t respect. Did the words themselves, or their objective value, change due to your changed perspective?
Of course their objective value changed. I’m not sure why you seem to be taking issue with that. If you heard an impassioned appeal to your emotions and then immediately afterwards discovered the appeal came from a pathological liar, would it affect your opinions?
Words don’t change depending whether they’re true or false but I would hope it’s clear their value does.