Understand it or not, it happened. Going from $3 to $300 in under a year.
Just because some people stated seemingly silly reasons for their predictions doesn't mean everyone betting on it is stupid. They may be trying to encourage others, have an intuition, hope to detect the peak and quickly sell, or even not care about money and be playing it as a game. But at the end of the day, whoever makes money is not the stupid one. Today GME is $250. Plenty of them can be getting rich now.
I have a thought that understanding how the stock market works doesn't matter much. Most of the knowledge from that is already bakes into share prices and the movements are pretty much random. So you very well could win by not knowing what a short is.