I've seen this happening increasingly with new hires, and I don't know why it keeps occurring.
If you're new to a company as an admin or analyst (marketing, sales, revops, cs, etc.), your first priority should be digging deep into the system to understand how and why it is set up the way it is. That leads to digging into the processes and asking how and why here as well.
Even if the company you join doesn't have good documentation, do the research. Make the documentation for them, then ask if it's correct.
Don't accept any projects until you're confident you know how the work you do will impact users downstream.
Get comfortable asking why (ask 5 times) to get to the root of a problem or a request.
Be able to explain the impact of any changes you make that will flow downstream.
If you don't have sandboxes, TEST on a small sample if you're not sure what outcome will occur before running entire programs.
Most importantly, never stop asking questions.