I think thats the catch….being able to use it safely. They say only one child at a time in case they bounce on/into/off each other etc. But thats very hard to police with siblings/friends. Say many trampolines have broken zips/catches on the nets.
People working in hospitals do seem to feel there is more accidents from these than bikes, skates etc. so just going by that. All food for thought, but I’m never getting one.