I'm glad you got this experience this at such a young age and saw through it.

This is the story of the rest of your life, remember always that 90~% of "experts" will either be retards or straight up lying to you as a result of bad incentives.

You'll also continue to find that most of the people around you, including those that you like and generally respect, are NPC's outside of their very narrow scope of experience/expertise.

It can be a burden or a blessing, frame it with care.