Of course the first period of experimentation and discovery will lead to unexpected and unpleasant results. All new technology takes time to mature, for the users to get an understanding of its tricky implementation bits and long-term impact. It's not wise to immediately put all your eggs in a brand new basket. But the ones who experiment and adapt will always eventually outperform those who refuse to change and stick to tried-and-tested. That's the very nature of evolution.
Evolution is blind to such concerns. Those who "experiment" might be wiped out because of their experiments gone wrong, and evolution wont care at all.
A creature inventing tools might have an evolutionary advantage over others. A creature inventing e.g. biological warfare and nuclear weapons might have less an advantage, it can easily wipe most of its own kind and even collapse its civilization (losing even more advantages).
