Much of the leaf blower usage in my area is just to blow the grass clippings back onto the lawn when they end up in the street/driveway/parking lot/sidewalk/etc

Much of the leaf blower usage in my area is just to blow the grass clippings back onto the lawn when they end up in the street/driveway/parking lot/sidewalk/etc. If the mower just had a mulching system which trapped the cut grass under itself, then there'd be no need to blow the cut grass at all, it would already be on the lawn. It's funny to me watching the lawn crews get out their blowers at the end of every mow to blow the grass clippings. It seems like such a waste of time, and hence money to pay them for that labor. Simply preventing the need for using a leaf blower seems like something someone should solve for these lawn crews.