This is true but also where wisdom comes in. It should be OK to spend 5 seconds saying, "I saw X, is it OK for me to fix it?", which allows people to know of a problem they might not know and also for management to say, "Don't bother, we are going to replace that next month".

As a more experienced engineer, I am more accustomed to what is reasonable to "just go and fix" and what needs dicussion.

I have devs who sometimes spend 2 or 3 days+ doing something that could have been done much quicker if they had discussed what they planned first instead of trying to be helpful!