At playgrounds, parent/toddler groups or various events there always seems to be someone who insists on constantly shouting "be careful" at every opportunity.
I'm watching what my kids doing and have assessed the risks of whatever is happening I get incredibly annoyed when some random woman starts telling my child to be careful.
If I allow my son to splash in puddles, stand on rocks, go near stinging nettles etc. I don't expect other parents to try to over-rule my decision about what is or is not safe or deliberately try to provoke anxiety about minor risks.