Accidents happen but not teaching children to do something 'risky' isn't the way to prevent accidents.
Teaching children to risk assess for themselves is.
"I was burnt so my kids will not be doing that " just moves the risk further down the line.
To prevent drowning to you never take the kids near water or do you teach them to swim?
I'll go back to my scout leader side.
When we camp the kids cook their own meals, on stoves and on fires. If we ask them for ideas of what they want to do cooking is always in the top 5- always.
The most accidents we have is with peelers. They peel their fingers, they grate their knuckles, they cut a finger. Once one has done it they all start because they begin to worry and panic and loose confidence.
Parents who are risk averse think that by keeping their kids away from sharp knives and hot water etc, they are protecting them. The reality is they are not equipping them with the skills to know how to do things safely.
Supervise.
Start with a cold kettle or tap
Get them to learn what level fill they can lift the kettle and keep control safely at so they don't over fill.
Teach them , give them confidence and the likelihood of an accident reduces.
Teach them how to treat a burn or scald if the worst happens.
Scouting teaches kids to risk assess, they learn what they can do and what they need more help with.
It isn't just doing risky things I see parents avoiding, the amount of kids with allergies who don't check before taking something or asking if it's safe or even having a basic understanding of what their allergy is is shocking to me. My dd has food allergies and she knew to always ask if it was safe before she ate anything from anyone. I have 13 year olds who still don't check ingredients before they eat something new.
You are doing your kids a disservice not teaching them basic skills.