We are talking shared houses, everyone has their own bedroom and share everything else.
But surely the issue is here, it is all down to every one having or doing their own risk assessment and then making a decision on what is needed.
These officers are standing in front of a large group of property owners and making a one fits all statement "we do not want any fire extinguishers in student accomadation".
If they went the other way Ie "you have all got to have sprinklers, L1 fire alarm linked to red care, fire extinguishers in every room, fire escapes out of every bedroom etc, there would be an uproar".
I can apriciate some of the buildings may not need any equipment, but to tell all, that student accomadation should not have any is (i feel) very dangerous indeed.