AFK punishing whole team

So, it kind of bothers me that when someone goes afk in a ranked match that the whole team still ends up being punished. a 4v5 (at least in low elo, idk about anything higher) basically means a loss (except in some rare cases). why should a team that had an afk be punished with a lp loss? at the very least if there has to be a deduction of lp I think it needs to be a lower amount of lp. i think this also needs to be true for cases where people stay active but sit in their base for a large portion of the game doing nothing but casting their spells in the fountain, if it turns out that something like this happens i think it needs to be made where at least a portion of the lp gets refunded from that match. i know that last part is a bit difficult to implement but it isnt impossible. why do the other players in the match have to get punished for one person (first we get a horrible game experience and then to top it off you get a lp loss to there is something wrong here). so because its a team game if one person deserves to be punished we all do?