Have there been studies on the potential advantages of loss of smell and/or taste from COVID-19? Westerners are too obese, and presumably part of that's to do with the enjoyment people get from unhealthy foods. Whereas if you can't taste anything food's basically differently textured fuel of varying temperatures. You'd have to desire to eat e.g. yogurt with added sugar over one without.
Some people might with diminished (but not completely eliminated) senses of smell might compensate by eating more of certain flavors that they CAN taste. Also worth noting that there are tons downsides, ignoring the obvious lack of sensory pleasure most people get from food. They are less likely to smell rotten and spoiled food, smell smoke from a nearby fire, etc.