I was trying to find out whether I could (carefully) paint glyphosate on the onion grass that grows too close to my flowers’ roots for me to dig it up, and I found the answer, but also found this, which amused me greatly.

Lawn? Is another type of soft green plant growing with your grass really bothersome, or is that just a belief from being told it’s supposed to bother you, a problem for which one must buy poisonous potions? Why worry about which “green things” one is mowing down to a few inches high? “Before I cut it down, I want to make sure it’s all just one plant.” A concern I’ll never understand, even if I had all the time in the world. Strangely, believers of this are often the same people who bag the clippings and leaves, then pay for fertilizers to replace the lost nutrients, water to prevent the shallowly-rooted grass from dessicating, and aeration because of the lack of organic matter (and therefore the earthworms, microbes, etc…) in the soil that keep a soil healthy and spongy. …which then grows a nice healthy lawn. …because they want a nice healthy lawn.