Any reason why your rank is visible to everybody?

Because if you are a low rank, higher ranked players just tell you to shut up even when you make good points. If you piss somebody off, they just look at your profile or op.gg and then have an arrogant attitude and treat you as an inferior. Some people get ranked anxiety like me. Others don't have the time to play League often. Some are stuck in elo hell. Maybe their mechanics are bad but game knowledge is decent. I hate being looked down upon just because where I ended up from my placement matches. You don't have to be plat+ to see if a build is sub-optimal or somebody/team is focusing the wrong target in a teamfight or how to play a specific champion matchup.