[terminalshort]

You are vastly overestimating the amount of land that is taken up by urban and suburban areas. Drive across the country and you will see that very little of the time you spend is in those areas. And then even that is an overestimate because those roads aren't random. They were specifically built to go through all the biggest cities on the way.

[forgotoldacc]

Fly over America and you'll see that it's basically all farmland , paved over, or desert. Lots of roads have trees lining them because the space between them is hard to use. Go up in an airplane above those roads and you'll see there isn't too many truly thick forest, outside of mountains where it's hard to build things. Alternatively, pan around the world with google maps. America is only about 33% forest.

And even then, insects don't only live in forests. They live in fields, marshes, all sorts of terrain. And it's overwhelmingly tamed and sterilized.