My take is that the shell script does not have any unspoken assumption or magic that is performed by the tool.

It all has to be in the script building up strictly from well-understood and long stable basic bricks (and the few places where you don't it's even worse with devops tools.)

Any issue, any question can be answered by reading the damn shell script and you're never dependent on a cookbook/recipe/playbook/component that you got off of some github repo that you need 5% of to do X.