Some bad ideas are surprisingly common. For example: there are some who wish the battles of science fiction were fought with nukes, poison gas and infectious microbes. There are others who think plaques and cataclysms should be rampant. Many believe alien races would be more interesting if they rambled in gibberish or communicated by means other than speaking altogether.
I am a writer of speculative fiction. I have published eleven titles of the space opera Strange Galaxy. The races, civilizations and technologies of this fictional world of many worlds are exotic and diverse. They are weird but weirdly believable.
The wars of Strange Galaxy are won by courage, prowess, resourcefulness and wisdom. These virtues are never edified by weapons of plague, poison and cataclysm so why introduce such weapons? I would rather my warriors shine.
Disease is tiring and miserable. Natural disasters are grievous happenstance. A will to evil and a yearning for good are far more interesting.
Characters, human or otherwise, are the life and drama of a good story. Individuals as characters are those with individual personalities. A language barrier is impersonal. It marginalizes individuals by distracting from their personal thoughts and feelings.
Yes, all things are clean of themselves... but not all things are expedient. Pretense is uninspiring. Cynicism is disheartening. Extraneous is burdensome. As an individualist and a friend of humanity I am contemptuous of disease, the language barrier and weapons of mass-destruction. They are boring so I have no use for them. My Strange Galaxy is lithe and vigorous without them.