Sure, try not to be useless, but if the company doesn’t have guardrails that’s not on them. If an intern deletes something: why did they have access in the first place? Why wasn’t there a backup?
Of course, many companies are far away from the pareto frontier, but there are often tradeoffs for safety and people have to use judgement about when to go slow and when they can go fast.
This bit is important. It's not great if a new hire nukes production, but it doesn't preclude them from being a B or A.
Additionally being considered a C isn't necessarily a blame game. If an employee nukes production multiple times, they may not be in the right headspace to work at that company, through no fault of their own.
It's trendy in buisness culture right now to erase the individual. Zero accountability can also mean zero growth. I don't think it's honestly the most enjoyable situation to be in.