I understand what you mean, it can be frustrating. My mum does a similar thing, or she will tell my son off for doing something that I wouldn't mind him doing 😬
Most people don’t need to be close or see a kid often to care if they feel their is a potential danger and the fact they don’t see her often means they don’t know her abilities so it’s even more normal to be worried, also, you might be once of the good parent who gives her kid freedom because you know what they are capable, but there are also lots of parents who are careless and let their kid run around freely because they don’t even notice dangers around If you have started by telling them there is no need to worry as she is very capable but they kept going, fair enough, if you just went from 0 to 100 as in keeping quiet straight to shouting at them, that would really suck
If you’re the care giver with your child 90% of the time then I wouldn’t worry about the odd ‘be careful’ comment from others
I think it’s a very normal reflex for anyone to say that to any child unless they see them all the time and know their limits. Yes it’s annoying but I think you might be overreacting a bit, when they’re just concerned for her safety x