I am unsure who would have the liability to pay for a knocked down door in case of emergency, but when it comes down to it, if they need to respond in a life threatening situation, who pays for the door would be least of my concerns!
We have had the ambulance come to our apartment four times in the last six months, there are three fire doors for them to negotiate. Each time was an emergency. That would end up costing around 12,000 in repairs for a pensioner.
We do make arrangements to keep this person attended as much as possible but there are always times when one needs to be away from the household. Common sense and empathy need to come into play unfortunately not in this case.