"you should keep your child in a rear facing car seat until they're 4 - it's so much safer"
"Can't believe you'd even consider a 2nd hand car seat"
"Get a new car to transport your kids around - a big safe SUV, not a 10 year old deathtrap!"
I'm sure you've all heard/read the above loads on MN & elsewhere, yet when have you ever heard someone say "Not a very good driver? you should get some training"
I lacked driving experience & therefore confidence a few years ago, so on recommendation I did some advanced driver training with the IAM - Car control stuff, road driving techniques, hazard awareness etc, & it really opened my eyes.
The big point I took away is that almost ALL car accidents are completely avoidable - even those that you'd think you have no control over like being rear ended/sandwiched by a distracted driver when approaching some traffic lights. Check your mirror early, leave large gap, slow down gradually, no sudden braking, hey presto - no accident. 9/10 drivers - wait until the last second, don't anticipate or look ahead, brake hard, etc etc.
AIBU to think that if people truly cared about the safety of their children when driving them about, the first thing they should do is to acknowledge their level of driving skill & get some proper training? It's not even that expensive when compared with a £300 child seat!