During the fall they make sense otherwise a lot of people would probably be dying from heart attacks. However during the summer when there’s no leaves it makes more sense to use a broom to quickly disperse errant leaf blades.
I believe it’s terribly inconsiderate to be revving leaf blowers sometimes two or three of them at the same time and serenading your neighbours with disturbing noise. It may not bother the person using it but it certainly bothers the people who have to listen to it.
I find people generally pretty inconsiderate a lot of times. We’re only here for like 70 years while being gradually replaced by others so why not make it somewhat pleasurable for other people while here.