P4P vs Mavic is just like DSLR vs "pocket camera". (Larger-sensored camera vs smaller-sensored camera.)
The Mavic (or pocket camera) can take "decent / good / very good" images (as judged by a given viewer using a given display device) in the non-demanding situations of:
1) good/bright lighting, and
2) situations where the brightest and darkest regions of an image are not too far apart
(And keeping in mind of course, that a "good" image is almost always more about subject/composition/lighting (in other words the photographer) than the actual equipment being used.)
In other words, a Mavic, in the hands of a skilled photographer, who can work within the limitations of the smaller sensor (see (1) and (2) above), and because he or she will likely have the Mavic with him or her more often, will almost ALWAYS be able to get a good/great shot with the Mavic...esp if the "display device" is Web/Instagram/Facebook/Youtube (as opposed to prints).
HOWEVER...
If that same photographer has access to a larger-sensored camera, in this case, the
P4P, in the same situation, and especially if the light is relatively low and/or the dynamic range capability needed is high, that photographer will ALWAYS get an image with the
P4P that is noticeably better looking, perhaps even to someone who might otherwise not be concerned with absolute image quality, than with a smaller-sensored camera, in this case, the Mavic.
You want the
P4P if:
1) You or your audience will notice, or will demand/desire, the highest quality image.
2) You don't mind the extra weight/bulk.
You want the Mavic if:
1) You or your audience will not notice (or care if they do), that the image/video is not of the very best quality.
2) You want the most portable equipment you can find.
This is the exact same argument when choosing what size land-based camera to use. Lighter / cheaper / decent (depending on viewer), vs heavier / expensive / great, both in relation to what desire/demand/requirement the end viewer wants.
It's also why photographers and videographers typically have a "portfolio" of cameras / lenses...choosing each day which camera or cameras to take with them.