Why are product designers so pretentious?

Mostly so called "Design Leaders" "mentors" are always spewing gyaan in my office, LinkedIn, social media but actually fail to implement those stuff. Every other week we have this call where designers are supposed to talk about a topic and every designer comes with such complex presentations, use big words as if they are saving the world or something. They unnecessarily complicate such simple topics and then go on to call themselves designers 🤡