You can compare apples and oranges all day, it is non nonsensical. The issue is, balancing up the HARM vs GOOD ratio, and cars, planes, trains etc all serve a greater COMMUNITY purpose, they help in the transport of necessary items like food, water, medicines and many other important day to day necessities, their is an undeniable benefit to the community, their is a certain amount of predictability to the whole thing and they can continually be made SAFER through careful design, rehulation and planning initiatives. So when fatalities occur, although unfortunate, the cost is weighed against the benefit to the larger community. Citizens owning GUNS on the other hand, serve little to NO Community function, like a lot of INDIVIDUAL liberties, they are selfish and serve an Individual at the EXPENSE of the greater community, they are something that could easily be lived without and the removal of GUNS from citizens would have a greater positive effect for communities that would overcome any negatives from the process.
I remember reading a study years ago about the cost to society from noise complaints regarding neighbours, and I remember they compared people who lived alongside a railway line with those who lived next door to noisy neighbours. You would think that they would both be equally negatively impacted by the regular intrusions into their household living, but the people who lived next to the railway line were far better off, they discovered that they rationalised the situation and weighed up the community benefit that trains provide against the general annoyance they felt when hearing the trains, and also because of the predictable nature of trains and the fact they knew that the noise was short lived, it made the situation bearable, unlike the neighbour who had rowdy neighbours, it was impossible to judge when the neighbours would cause the disturbance, nor how long it would go on for, and the noise almost always served no community benefit, it was always a selfish indulgence by the neighbour. These factors, No Community benefit and Predictability were major factors on the negative impact on individuals and to the community at large (the handling of noise complaints cost a lot of money, also sometimes people were killed over it) when handling Noise Complaints.
And this is the Issue, individuals who aren't obsessed with GUNS and don't feel the need to own one, get ZERO benefit from their neighbours owning guns and mass shooting are impossible to predict (statistically, they are INEVITABLE in America) when and where they will happen next, putting the average citizen in a fearful state (this is the state GUN NUTTERS prey on, hoping that if everyone becomes afraid enough, they will finally cave in too the GUN NUTTERS and buy a GUN for so called protection, even though STATS show you are more likely to be killed during a crime if you have a gun than if you don't). The average NORMAL citizen will weigh up the benefit of something as opposed to the risk to their health when advocating for something, and the actuarial risk of individual gun ownership for citizens has now become so great, and the benefit/loss ratio so unbalanced, that the general community is now at GREAT Risk due to a selfish individual privilege granted to citizens by the Government. Communities Interests must come first for them to be SAFE, SECURE and HEALTHY, selfish Interest will always erode any Community! Time for Individuals to grow up and put their communities first, and ironically, the Individual will also prosper.