objectively, you cannot be fat and healthy. This is a well proven and simple quirk of biology.
Of course, you can find a niche and exploit that market to enrich yourself. You very well should do this, it's profitable. You should also at least have some kind of idea of how large that niche market is so you don't paint yourself into a box where you're not maximizing profitability. Also understand that, this industry does not scale, it's one person providing specialized services, and a finite amount of time per day to do so, therefore, targeting a single micro-niche is not likely to be lucrative, and, I've often seen women with 2-3 different personas, with their own sets of social media/ads/websites, to target more than one niche for this reason. Totally viable if you're at all capable of wearing a mask at will. This is all MBA 101, they teach children this in school now.
The whole "beauty is in the eye of the beholder" thing though, often misused, and, misused by you. The idea that 'everyone is beautiful to someone' isn't what Plato was talking about. In The Theory of Forms, He presents the idea that beauty is temporal and fleeting, one observer may see beauty and the other may not, and beauty itself, or ultimate beauty as he put it, is something that is temporarily granted to someone *by their form at the time of observation*. Aristotle, being a student of Plato, corrected this vaguery in his work 'Metaphysics', defining beauty as symmetry, order, balance and proportion; all objective, measurable things that one either possesses or does not posses at any given time.
If you'd like a more modern example, Seinfield did an episode titled 'apology' where they present the idea of 'good naked' and 'bad naked', which demonstrates this quite succinctly.
