One worry of being too lean is the loss of pride with not being as mesomorphic as dedicated gym rats. However, when you are lean and nice looking, you tend to be easy going as well as well received by most, or at least able to maneuver and navigate around nicely. However, when you have strength and big muscles, people are constantly giving hate over jealousy, it makes things worse actually. Being lean is another wavelength, because it is a beautiful look, you ride that positive energy. Old people and young alike have a positive bias towards you. People compliment you randomly. I won’t lie, big muscles get their own attention but it’s always subtle and almost taken for granted. It is more gratifying, in this respect, being leaner than having big muscles, unless you are a top 1% tall and big giant nobody can ignore. Because strength and muscle is generally common and or unrecognized. Intelligence and technical skills are also underrecognized but that’s an aside.
Another worry of being too lean is cold and illness. This doesn’t apply if you live in warmer regions.
Given this analysis, the favor is heavily accumulated towards being lean.