It seems there is a misconception between infrastructure creation and management. Serverless doesn't abscond you from defining what infrastructure you want to create, it just reduces the management overhead once you have created it.

For example, you can both create a lambda and EC2 infrastructure using Terraform. However, once you have created a lambda function, little maintenance is required going forward, unlike EC2. EC2 instances require continuous patching of the operating system, managing disk space (/tmp filling up over time), and you have to plan for an EC2 instance to be taken out of service if it starts failing health checks.