You can extract a lot of value from bare-metal servers from Hetzner but you need to put some effort initially to get them going. That being said, it is not really that difficult. And, frankly, it a lot more fun.
You take care of disaster recovery, failing machines, the works. Getting a new (or replacement) machine from Hetzner takes longer than spinning one up on a cloud provider so you need to be able to survive some machines failing.