People are not going to stop using small replaceable batteries.
That ABC article I linked describes a family watching their 14-month old daughter dying over 19 days as the battery literally burns her insides while doctors continue to misdiagnose the problem until its too late. This is not a tragic one off incident, it is occurring repeatedly and will continue to do so if things stay as they are.
Excluding the issue of misdiagnosis, if every case was found by medical practitioner at first sight, there are still major complications and possible surgical intervention required to remove the battery.
These numbers are from a country with a population of 25 million. Im sure the numbers of injuries and deaths are much higher in countries like the US.
Parents should be doing that.