'What about the sensory sensibilities of blind attendees - they might find it disconcerting for a speaker to be greeted by silence.' Riverdance you have hit the nail on the head. If we attempt to cater for everyone's disabilities or sensibilities, life as we know it would simply grind to halt (as someone else said earlier).
Catering for the deaf, the blind, those with auditory or other hypersensitivities, would mean speakers at meetings would receive no acknowledgement whatever, there would be no sense of collective enthusiasm among the delegates. They would be dull, cheerless affairs.