From a Druid's perspective (which is admittedly perhaps of limited use when interpreting Biblical mythology given the wildly different contexts), trees are keepers of all sorts of wisdom and knowledge, not just of concepts like "good" and "evil."
A great deal of time is spent in some Druid traditions learning to seek and learn this knowledge from these ancient ones. This can metaphorically be referred to as eating the fruits of the tree of knowledge, or presented in other ways. However, some Druid traditions also spend a great deal of time preparing the practitioner to handle the gifts and responsibilities that come with partaking of these fruits. Those who attempt to partake in the fruits who are ill-prepared to receive their gifts do not have good results. That's not to say there are necessarily bad results, but you do not cultivate enlightenment, for lack of a better term to use here.
Thus, as a Druid I would tend to read this story as about a pair of humans who didn't prepare themselves for the mysteries and were told they weren't prepared for the mysteries. They tried to eat of the mysteries anyway, and were overwhelmed and confused by the ordeal. So the warnings could be less of a "I just don't want you to know" and more of a "stop being impatient, you are not yet ready to know."