Does it really matter whether or not your mower blades are dull? Yes, absolutely.
Dull blades pull on your grass instead of cutting it clean. This puts stress on the grass and can lead to disease and discoloration. It can even kill your lawn. Cleanly cut grass reduces the risk of all these problems.
It’s also just easier to mow when you have sharp blades. Think about it in terms of your kitchen knives. How much easier is it to cut through an apple when your knives are sharp? Your mower will work better because sharp blades prevent clogging, as well.
So don’t delay when it comes to sharpening your mower blades. Your lawn will appreciate it.