What? Sharing the difficulties you encountered is helpful for other researchers and for replication studies. The goal of a paper is to share your findings in a manner that is clear and helps advance knowledge in your field, and frequently the most important thing you can share is how you performed your experiment followed by why you chose to perform that experiment and whether it conformed to your expectations or not.

Having personally gone through a couple years of lab classes; no, not really. Lord knows your professors may try but at least in my experience the profundity is lost on students. You get a lovely tour of scientific concensus, but most people see the experiments as being fore-ordained or like a recipe.

To put it more simply university lab classes demonstrate so many things that are true that people sometimes never realize that science is a method for disproving things.