K strategy seems counterproductive to an insects main strengths. Small resource investment. Short life/death cycle for high evolutionary adaptations. (With these two things in mind, getting vast numbers created greatly amplifies your adaptive ability, like a virus)

And it would be a drawback when you consider their weaknesses. Given their size they have little ability to control their temperatures, pressures, and other things. So their ability to keep “homeostasis” is very negligible, which is their main downfall. Heavily investing in one area or one offspring and NOT spreading as rapidly as possible is inherently counterproductive to their survival chance.

As an analogy, I’ll equate it to us. Imagine how much our survival chances would increase if we got off this planet and had other planets that also could spread life? Focusing on just this one is a death sentence, as every couple 1,000,000 years, life ending threats happen.