Thank you for defending me, Mod. Let me add something.
I am somewhat torn on this issue. On the one hand, there are halachos that are based specifically on the point you are making. For example, the reason that we use a candle for bedikas chametz instead of an avuka (torch, which would provide more adequate light) is because using an avuka would create a sakana when checking inside small openings. Rather than risk someone setting fire to his home or not checking the small openings at all out of fear of doing so, the Chachomim told us to use a small flame.
On the other hand, some people are too quick to blame mitzvos for tragedies. There is clearly a balance between how much Chazal were willing to modify our practices to minimize potential harm and how much they expected our common sense to take over.
I agree that if people do not know enough about fire safety they should be educated. I agree that if a specific situation is beyond reasonable control of safety (e.g. kids that can get to a fire and there is no way to safeguard it from them, or a lack of proper equipment to cover an unattended flame) then perhaps an alternative that does not involve a hazard needs to be considered for that situation (e.g. no fire in that house).
But to say generally that the practice of leaving a flame on over YT should be ended? Come on. Education, Proper Equipment, and Common Sense are what is in order.
Unless the purpose is just to attack and aggravate shomrei mitzvos.