True, but there are many, many areas where it is clearly written that the science goes "We know this magic thing does this. We don't know how it does this, and we don't know where it came from, and we don't know how to stop it, but we can give you a nice scientific description of what it is doing at this moment." But remember that as far as magic goes the 'consensus' started at "Beats the fuck out of me". So the fact that they have some processes identified and can show cause and effect between some things does not mean they are able to figure out what is going on. People realized that drinking stagnant, smelly water was a good way to get sick long before they had any idea about bacteria, parasites, and other such things, to say nothing of the fact that, hey, these rocks that caused the film to go black gave everyone around it cancer. You don't need to know about microbiology to know that a splint and sling can help a broken bone set better. We're basically at Civil War battlefield medicine level when it comes to understanding magic, in part because the 'rules' of magic actually change over time, and in unpredictable ways.