Whenever I need to run Docker containers manually, I end up looking up the basic syntax. Every. Single. Time. And I do this for a living. Here are my most Googled Docker run arguments, aka. My Docker Run Cheatsheet.
In large organisations using the public cloud to store code, it's unfortunately not uncommon to accidentally make something public that should be private. Whether that's due to negligence or ignorance, a leak can have dramatic consequences.
Unless you know what to improve, every change you make is just shooting in the dark. This is why feedback loops are so important - the faster you know if something works or not, the sooner you can point your efforts in the right direction. This is applicable to both changes in software delivery processes, as well as changes in the code.