Not all uninvited plants are weeds in my yard; some are welcome guests. The violets that pop up on every patch of cool bare earth make a lovely groundcover. They flower well into summer. They only grow a few inches tall. (No way do I ever mow.) And if I want to claim the space for something else, they’re easy to pull up. And very, very occasionally I spot a tiny bee visiting them.
These aren’t weeds; they’re native plants.