inquiry: logic behind dodge punishment system

since my last post was considered as another 'whinning' post I will put it this way:

1. google shows no answer of my question
2. how is a system that treats both 'exploiters'(dodge whenever the team comb is unfavorable) and normal dodge players the same way considered 'okay'/'no need to improve'?
3. what is the difference between (because I am dumb and can never figure this out by myself) --- -if you don't dodge you won't get punished -so if you dodge a 99% lose game thx to trolls/already raging teammates it is your decision to get yourself punished -thus the system is fine and (imagine someone get raped and was told the following): -if you don't wear sexy clothes you won't get raped -so if you wear sexy clothes to looking for a hook up/ be attractive it is your decision to get yourself raped -thus the raper is fine