That cataclysmic events have traumatized the earth is beyond discussion. The disagreements are in the frequency, cause and extent. Probabilities are that there will be future events. Either one believes the events are random or there is a periodicity to them. Since human lifespans are so short few of us could ever expect to be living when one occurs. Seems like a lot of energy being used to debate something that has little practical application or relevance. That being said, it is still a fascinating subject.