What should we learn from the market? That it's volatile and can experience ups and downs? That's more like the prerequisite knowledge every newbie normally gets exposed to. Every Investor or trader that's in the market and that's learning from the market like the way you put it is doing so just to make a profit from the market. Your knowledge isn't complete until you've applied them in practice and the best way to know that you've studied and known the market is when you've gained profit from it.

For long term holders that are interested in buying during periods when the market is experiencing some downtrends it's understandable to talk about learning the market and knowing that bears are part of the market. But for those that just want to opt in and out as fast as possible and still get some profit from whatever they made the short term investment on, when it's going down, there is nothing there they would want to learn and understand most expecially when what you've invested into isn't Bitcoin. Profit has ways been the main and fundamental goal at the back of every investors mind and That's why they most times don't enjoy most bears.