I use roundup to kill weeds in the flowerbeds and the concrete areas. I have a professional come spry the yard for weeds in the Bermuda grass. He comes four times per year.
My wife is master gardener, and loves flowers and plants stuff to attract bees, bumble bees, butterflies, hummingbirds, and any pollen eater. We had so may Monarch butterflies last year it was kinda freaky mowing the yard and have dozens of butterflies swarming around me. Knowing the can't bite or sting helps, but when they get in my face it its freaky.
We have many dozens of various types of butterflies make a chrysalis and hatch into butterflies.
This purple bush had so many bees on it it sounded like an overloaded transformer. It was buzzing. We found local beekeeper that came and took a part of that bush to plant at his house. He gave us some fresh raw honey.
Our Koi pond has toad orgies every spring and into the summer. We have round four of tadpoles right now. The Koi eat a lot of the tadpoles. We end up with a few dozen tiny toads each year. And lots of other native wildlife.
Yea, we use chemicals to control weeds.