Being a dominant, i think aftercare is required, specially cause i think i need it as much as the submissive partner.
I mean think about it, in normal i am a caring person and then in the scene as a sadist, i have hurt my partner like anything and moreover i have enjoyed it too. so the after part of the play is when i need to be felt that what i have done is not bad or harmful or anything.
In most cases, my submissives have not required an aftercare while others do. Similarly, most other dominants does not need an aftercare and i do. to each his own.
Just a dominant’s point of view on aftercare i guess.