I don't really see why. There could be small harms as well.
Imagine what selective sparers could do with this. They hide their spar stats, spar looking like a noob, and then when they have some insane record they make them public again.
Or people claiming to have stats they don't, that would get annoying.
Plus, i like the simplicity of clicking on a player and being able to judge their relative skill level via stats.
Overall, I don't want it.