Keep in mind that the main function of "smart" airbags is to lessen the power they deploy at if the passenger is very small or out of position. Even a very small adult is not likely to receive anything worse than a greater number of broken bones from the original, fully-powered, airbags. It's KIDS that are at risk from airbags, and even they are mainly at greater risk due to behavior and lack of proper restraint than anything.
One of my friends (an instructor) was telling a group of students last week that sometimes you have to look at the whole situation and realize that because kids are small and fragile they have a much greater chance of being killed or seriously injured in a crash and figure out who can afford to give up a little bit of crash protection so that someone else can gain some. This is a cipher that changes constantly and must be re-evaluated often.
For a single child family, the best solution for THIS moment in time might be to look at a seat that allows Euro routing or has a load leg or Aussie tether. For a multi child family, there are enough other factors involved that you can put a ffing child in the center to get the extra side impact protection, or you may need to factor in distracted driving due to fighting sibs.
Ultimately, you need to take a deep breath and do what is reasonable and logical to protect your children from car crashes. It's never going to be perfectly safe, so really, you can't drive yourself (drive! haha, puns, I does it without even trying!)
crazy trying to chase down every possibility. Modern car seats do an astonishing job of protecting children even with the the pathetically high misuse rate, so just being in a PROPERLY USED seat gives your child a huge mathematical advantage.