Mowing the lawn is never about mowing but people wanted to be busy, feel productive for a bit, some exercise, and helping to clear thoughts. For others it might be driving long roads, or doing chores inside the house, cycling, and such. Otherwise, it’s inefficient and useless, the lawn can be replaced with better flowers or even small garden, or simply pave it and save the time and efforts and electricity/water doing a repetitive thing like it, and also spare your neighbors the noise 7am Saturday morning, and if you look at the bigger picture, the process is a total waste, you waste water to grow crops only to waste electricity to mow it later, it provides no useful product or outcome either, no flowers, no food, not even cosmetics like fancy looking garden, plus the maintenance and/or initial installations.