You know that old saying, Better is the enemy of good? I think this principle applies to gardening, or my garden anyway, when it comes to trying to keep everything in order.
We have a big place; my husband works a lot of hours and it's impossible for the two of us to keep a place like this looking perfect all of the time. It's never going to happen. I'd rather enjoy what we have than be a slave to it anyway.
We keep the lawns, pastures, and garden paths mowed. That in itself is enough work. But other things we let go. For example, someone put ditches next to the road that runs beside the pastures. I'd like to wring this nameless person's neck, because it doesn't help with drainage, running cross to the main drainage routes as it does, and it creates work for us. It's a good 2400' of ditch. We mow it twice a year to keep down the woody plants, and try to time the mowing so as to allow Bidens to fill the ditches. In a wet year they are magnificent in September. My husband doesn't really like for the ditches to grow up like that, until the Bidens bloom. :) But I think he's getting used to it.
I want parts of my garden to have structure and order, but overall my garden is too big, and it's too hot in the summers to keep everything just so. With so much new garden around the house and only expanding, I will have to take a more laissez-faire approach to the big perennial bed and the beds near the old house site.
I do spend a fair amount of time weeding. But each spring the Dead-Nettle comes up in the big perennial bed, and I leave it until it gets too tall or starts dying back.
The chief reason I leave these plants is that the bees love them. It's basically a pasture for them to feed on, until other things start blooming.