Grouping guns with the other things is silly false equivalence. A gun can be set off easily and accidentally, and it almost always results in instant severe injuries to either the toddler or their surroundings. Knife/ladder/heatstroke injuries are all things that either take time or deliberate effort. Not only can they be caught before something bad happens, they are many degrees less severe than guns. You'll find carelessness or malice in any area/activity/weapon, but guns provide instant access to put those into action.

sounds like you believe groups such as the NRA make up reasons to suggest that a gun isn’t ever a problem

NRA keeps saying that guns aren't the issue, but video games & movies are. They lobbied against federal research efforts against gun violence studies in the 90s (and continue to do so), and even accused the CDC of "anti-gun bias". Most of their advocacy is built on shifting the blame from guns onto anything else.