Some peeps go all out on raid bosses as they aren't on forums so don't understand the sharing. Others can't be bothered clicking on a weaker squad as it takes an extra half a second (some because they don't want the raid boss to disappear - which it wouldn't if there was more sharing).

I have a single 6 star as my 6th squad and use her for other players' raid bosses, does 5-10K damage to big bosses leaving plenty of hp left for others to get their tokens/badges etc.