None of them are taking on the risk of what the tenant isn't paying or you don't have one. Landlord also isn't free money. You have a lot of bills to pay.
You have negative bills to pay, because you get money purely by virtue of having those bills.
Landlord is not a job, it's a state of ownership. Owning a company is not a job either. Being a CEO is! And you can be both. But simply owning something is not a job.
You can say property management is hard, and maybe it is. That's a separate thing and the VAST majority of landlords actually don't manage their property. So being a landlord is very, very easy.