Over the course of the years I've tried to like Docker. I've found the benefits to be not worth the stress and aggravation for the associated "magic" that it takes to provide the kind of user (developer?) experience they're after but have thus far failed to achieve. It's like the uncanny valley of sysadmin tools.
The concept of getting away from snowflake machines and making your infrastructure more code-like with deployment scripts is the way to go, but you certainly don't have to use docker for that. At the end of the day, it's more about forcing your team to be regimented in their processes and having a working CI system for your systems related stuff. You should be able to start from nothing and with a single command have a developer's environment up, all the way to a fully scaled prod system.
Docker is just a tool to try and get to that point of evolution (albeit a poor one).
The concept of getting away from snowflake machines and making your infrastructure more code-like with deployment scripts is the way to go, but you certainly don't have to use docker for that. At the end of the day, it's more about forcing your team to be regimented in their processes and having a working CI system for your systems related stuff. You should be able to start from nothing and with a single command have a developer's environment up, all the way to a fully scaled prod system.
Docker is just a tool to try and get to that point of evolution (albeit a poor one).