Video proves that your rank alone doesn't make you wrong
Just because a player is bronze or in a lower elo, it doesn't mean that they're automatically wrong when it comes to game theory or strategies.
A bronze player who says the following build is good on Garen isn't wrong because they are bronze:

This video explains why in a very objective way. A person's stature does not alone invalidate that person's opinion/knowledge/ideas/etc...
There have been professional level coaches who were gold, but had enough game knowledge and understanding to coach some of the best players in the world. There are diamond/master players who frequently coach players who are a higher rank than them. There are many reasons why someone is the rank that they are, and we all have our own strengths and weaknesses. A master tier player could have less game knowledge than a gold player, but might excel in mechanics and have specific knowledge relating to their small champion pool that the gold player doesn't have access to.
Rather than degrade others based on rank, there's so much we could learn from one another, if we just opened our minds and accepted new ideas. Maybe they're still wrong, like in the case of the Garen build above... but then at the very least, explain why, and maybe suggest a couple better options.