As a group they may actually lose money, though they might not realize it. The big thing that nobody factors in is insurance - personal auto insurance policies

As a group they may actually lose money, though they might not realize it. The big thing that nobody factors in is insurance - personal auto insurance policies generally don't cover business use, and if your insurance company finds out you were driving for DoorDash when you rear-ended someone, they won't pay out. You can get a commercial rider for your policy, but then you won't make any money. A buddy of mine was trying to make one of those companies his full time job, and it just didn't work out. There are too many hidden costs.