Science, at least by what we may call by modern methods and standards, is very "new", compared to many of the studied topics. Some decades, or at most a few centuries (geology, evolutionary biology, astronomy) compared to the millions or billions years of existence of many "objects".
Perhaps to be compared to use a snapshot of a growing organism, then making claims about the whole proces. Some may object that our telescopes observes not present day universe, but a cut through the ages. Still the individual objects may only have been observed in an extremely little part of their existence. Perhaps a problem?
Could some very "long term" observations be of value, making the period of observation at least a little bit longer?