All I know about MAC is that the makeup is too heavy and all the MAC makeup girls at the counter look like they had their face painted, it looks like theatre makeup to me which is I think the purpose of their makeup. So maybe that's what the concern is, it's so heavy that it would be hard to take off and will clog up pores? I would assume you don't need super heavy coverage like that unless you were trying to cover up scars? I just Bare and Everyday Minerals bc it feels better and it's a lot easier to apply IMO.