Landlord is about luck of the tenants. A bad tenant will destroy your property costing you a lot of money. A bad tenant will not pay thus forcing you to have your property earning nothing for months until you can legally evict them. If you don't have enough tenants you lose money because you still have to pay your costs (the bank for your loan, maintenance...).
You can make a lot of money but it isn't easy money. (particularly in the early years, once you have the property paid for it is much easier)
Easy, you outsource your tenant management to a company that does that sort of thing. There's many highly reliable methods to get good tenants. Outsourcing to a company that specializes in that works because you're already making free money by being a landlord, so now you just make less free money.
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.
You can make a lot of money but it isn't easy money. (particularly in the early years, once you have the property paid for it is much easier)