Hello and welcome to the forum.
Pulling manes is something that is done for the show ring or because someone just thinks they want to because it makes their horse look better. It has nothing to do with quality of care
Daily grooming to keep the skin stimulated, watching for bug bites, cuts, fungal/bacterial issues picking hooves and proper feed for the job the horse has (or doesnt have) are some of the things that go into quality care
Please ask questions - there a lot of informative and helpful people on this forum