Sometimes wrong things get upvoted and reach to the top on Reddit. How does this algorithm stop that? Case: In football (soccer for US folks), there was a report by Marca about two players fighting in dressing room after a terrible loss. It got to 6000 upvotes on reddit. Turns out later everyone denied it. Now, would that show up, unless corrected at the source? because you can't invalidate keywords. What happens when things are in a flux?
For a market analogy - while the market hyped up Apple and Microsoft, they also hyped up Theranos. Market had the 99 boom, and then 2000 crash, and a 2008 crash. That is, market can very easily by misled. Replacing a system with something slightly better is probably not a good idea. There are ways Google can be improved or replaced, but things like these are not the way.
For a market analogy - while the market hyped up Apple and Microsoft, they also hyped up Theranos. Market had the 99 boom, and then 2000 crash, and a 2008 crash. That is, market can very easily by misled. Replacing a system with something slightly better is probably not a good idea. There are ways Google can be improved or replaced, but things like these are not the way.