Plus, most insects lay thousands and thousands of eggs. Whatever the carrying capacity of the local environment is, insects will fill it quickly. Pesticide use

Plus, most insects lay thousands and thousands of eggs. Whatever the carrying capacity of the local environment is, insects will fill it quickly. Pesticide use and loss of habitat make that carrying capacity smaller. Smashing bugs on your car windshield and collecting specimens just makes room for more juvenile bugs to survive to adulthood in a few hours/days.