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Agreed - There is no way to perfectly model all the interactions - but an imperfect model that attempts to account for SOME of the major interactions between the variables is better than the current method.
The beauty of these systems is that they "learn" over time. At the beginning the factors governing the interactions are best guesses. Someone has to plug in a number for each variables impact on the other variables. Over time - as data are collected and results measured - the factors get refined and the model improves.
Can anyone really argue that pegging a number for the total catch of a species - without taking int account the effects on other species is really the best way to go??
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