I don't think something like that would really be needed it's unfair to force things on people but i do have sympathy for you in that position. SV being a story dungeon you kind of want to watch the pre boss cutscene and i always wait in this case since it's just a single one not like in Castrum and Prae where there are hundreds of cutscenes and new players want to watch every single one of them. The last boss in SV takes about 2-3 minutes to kill so it's hardly an issue to wait a minute or so for a pre boss cutscene.

Unfortunately some Tanks are just divas who want everything their own way.