That is the question this time of year! I mean they’re only leaves, how much harm can they really do? I took the time to Google the pros of raking leaves.
Pro#1 It allows your lawn to breathe and keeps the grass healthy
Pro #2 It keeps your lawn looking tidy
Pro #3 It’s a great exercise and you get some fresh air
In conclusion: Rake! I’ll even come help if you want. Although, I might be out of town that day haha.