Without insects all life on Earth would cease to function within weeks, if not sooner. Quite apart from the fact they are an integral part of the food chain and the smaller animals that live on them are predated by others right the way up the line, they perform numerous pollinations vital to the ability of plants to survive, and the plant eaters are the mainstay of human dining.
Yet insects are everywhere overlooked because of their abundance and never taken into account when we build or do anything on the land. Humanity notices animals and notices extinctions in animals they notice but out-of-sight is truly out-of-mind when it comes to insects. Many years ago the krill beneath the Arctic Ocean seemed to be in decline due to pollution. They are at the bottom of a food chain that encompasses all sea life. If they dropped in number or died out, life in the Oceans would cease.
It is considered probably that once life in the oceans died out land life would soon follow because of the differences made in weather conditions from the differences in the exchange of gases at the water’s surface.
I have never seen a krill but my life depends upon theirs. Insects should not be overlooked simply because we are functionally blind.