Presumably the item in question is not an ointment or cream, but some sort of device. Personally I'm having trouble imagining what sort of 'cosmetic device' suddenly now has a medical purpose. I jumped to decorative contact lenses only because I'm aware of some past FDA crackdowns in that area. Maybe a foot spa? There are likely bigger issues with the new marketing plan than trying to comply with 14971, but a rigorous application the standard would be a benefit to the manufacturer, even if they only see having a RMP as some sort of paperwork exercise.
The sole point of relevance I see as being potentially useful, for the specific circumstance described here: If the device has already been on the market, presumably the manufacturer is aware of the harms that arise from the use of the device because they have been taking complaints and/or collecting data about their market. If they are trying to start an assessment of risks from scratch, they absolutely need to have some basic understanding of the harms, whether they intend to 'calculate' acceptability or not.
The fact that a product has been on the market as a cosmetic is not necessarily relevant.
The sole point of relevance I see as being potentially useful, for the specific circumstance described here: If the device has already been on the market, presumably the manufacturer is aware of the harms that arise from the use of the device because they have been taking complaints and/or collecting data about their market. If they are trying to start an assessment of risks from scratch, they absolutely need to have some basic understanding of the harms, whether they intend to 'calculate' acceptability or not.