It definitely can kill grass if you have enough trees and therefore leaves. I still have a few dead spots from the leaves I missed last year. I do basic maintenance and care for my yard and it’s thicker and more lush than neighbors who go full tilt. Part of that maintenance is making sure the leaves don’t kill the grass. I did one round of mowing the leaves and when I could finally get around to clearing the rest that dropped instead of mowing I blew it all into the storm ditch.
I have a major problem with the idea of bagging it up and sending it somewhere else, but, you do need to get the leaves off of any grass that you want to survive and grow. Maybe you don’t care about having grass, that’s cool but for the umpteenth time here just so I get it across, leaves can and will kill grass.
You need to add that to the previous comment. You sounded like a loon who thought that leaves wouldn’t do any damage if left on top of the grass to smother them. You will lose some grass and depending on how many leaves as well the temp and amount of rainfall, you could end up with a ton of dead grass. I cleared my leaves as soon as I could after they fell.