Possibly - however it's another case of 'it's somebody else's duty to care for my children' well no it isn't it's YOURS. You know the law - you break the law - someone asks you [and it seems quite reasonably] to comply or at least prove a willingness to comply and you start mouthing off and the outcome is of course somebody else's fault. Secondly it was not a road it was a coastal path , possibly ridden by many children of that age daily. Third what exactly did he do to make certain of his daughter's safety himself ? He passed over his phone and said 'ring mother' - does he not know how to use the phone ?
Like many speeding motorists if you break the law and you get caught shut up and accept it - the responsibility WAS HIS - he was the so called adult, he was the parent and he behaved like a spoilt brat.