Can someone Explain why riot punish chat behavior but not game ruining ones?

Hi, i would really like someone to explain to me why riot punish only chat behavior and in no circumstance game ruining ones?(feed, periodic afks, afk all game in jungle, etc) this is totally the opposite of every single game i ever played, and i find it very very uneffective and very frustrating. Example: Someone can go all game afk in jungle not ganking a single time (i got 10 chat rest for pointing out 2-3 times politely that a jungle ** had 1,489 champion damage in 42 min game?**) Please someone enlighten me, preferably a riot employee or experienced board members, altought any toughts welcome ofc.