There are many other reasons to take protein supplements. High protein foods can be expensive (protein can be too but there are many options). It's also a quick add to a meal vs prepping an entire meal.

You don't need to be an athlete to workout 5 days a week and if you want to visually see some of the results protein supplements help. It can also help with recovery whether you're strength, training or training your body in any other way. You don't have to be an athlete to want to be physically fit. Protein can help.