So you will spend money as long as it as "any possible safety benefit" for your kids? Really? I bet I could find a hundred things that you could, but don't do because you view that any possible safety benefit is really marginal and not worth the expense or hassle (even though you could afford it.)
Yes, I will spend the money on safety every time. I have 3 kids, and one is under the age of 2. We live in Tucson so flying anywhere is a huge expense. Even flights to San Diego are around $200/person and it's super close. But we pay for 5 tickets every time. And have since her 1st flight at 2 months old. And same with the others, on their first flights, at the same age. It's never been a question. If adults and 2yos need to be buckled in, why on earth wouldn't my 1yo be? By your reasoning, I assume you don't wear a seatbelt on the plane? As the risk of danger is negligible, so why bother?
For example, do your kids wear helmets at the playground? (Statistically, they are much more likely to suffer a serious head injury on the playground than to be in a plane accident.) Why not? Wouldn't they be safer?
Have there been studies showing that wearing a helmet on the playground is safer? Because it very well may not be, as it makes the child's head heavier, therefore offsetting their balance when running and climbing. So no, they don't, as I can't say that is definitely safer, and in fact, I can see how it would NOT be safer.
I assume that you made sure that you purchased a home near your kids school so that they can walk and minimize time in a car (again one of the biggest causes of injury of a child). IF not, why? Too expensive? Not convenient?
Actually, we did, in our old house/city. We specifically chose a house that was close enough to walk the kids to school. And we walked nearly every day, barring bad weather. That was in Washington, DC. However, now we live in Tucson, where there are no sidewalks, tons and tons of senior citizens here for 6 months of the year (so they aren't super familiar with driving here during the morning rush, yet they still do, and some honestly shouldn't be driving), and tons of wild animals roaming freely. So while we only live 5 miles from the school, a distance that I easily biked with the kids in DC, it would NOT be safer than driving. In the 9 months we've lived here I have seen about 12 bobcats on the road between our house and school, at least as many coyotes, far more javelinas (often with their babies, so the moms are particularly aggressive). Plus we'd either have to walk through desert scrub (with the scorpions, huge centipedes, and tarantulas) or be on the actual road (and people treat roads like highways here, so they literally drive at least 60 on 4 lane roads with no shoulder and no sidewalks) and I honestly don't consider either option to be safe. So sadly, while I'd love to bike it, it really isn't safe with small kids. If they were older, sure, I'd try it (though we have a killer hill to climb to get back home!), but not with a 4yo.
Look, I don't begrudge anyone who wants to buy their kid a seat. But the truth is that it is a marignal (if at all) increase in safety for the child. And I say, if at all, because as evidenced in this thread, there seems to be disagreement among countries as to whether a kid is safer in a seat or being held.
To me it is wasteful and a hassle -- especially when they are very young and when I want to be nursing them on takeoff and landing anyway.
I exclusively nursed all 3 of my kids. Youngest is still nursing. I never had an issue on a plane with any of the 3. I nursed them immediately before takeoff and every single kid fell asleep on takeoff and slept for the majority, if not all, of the flight. If need be, I nursed them again before landing. With my older 2 I sometimes took pumped bottles along, but very, very rarely. And while the older 2 used pacifiers as babies (1st till 16 months, 2nd till 9 months), my 3rd hated them from birth so she didn't suck on anything and did fine.
And again, buying meat is wasteful if I am a vegetarian. Ensuring my child is as safe as possible will NEVER be a waste.