Player A is Canadian.
Player A is at 1LP.
Game is a loss for sure.
Player A disconnects.
Player A still only loses 1LP.
Player B is not Canadian
Player B is at 1LP
Player B is a troll
Game is a win for sure
Player B disconnects
Player B only losing 1 LP.
Player C might be Canadian, but is irreverent in this scenario.
Player C is at 99LP
Player C's power just went out. Not by the weather or something that he could of seen coming.
Player C now loses 60+LP.
Player D just put his kids in bed and finally gets to play
Player D's kid faked it and started jumping on the bed.
Player D's kid broke their arm after falling off.
Player D rushes kid to hospital.
Player D shouldn't have to worry about losing extra LP, real life come first every time.
Player E is in a game, playing poorly.
Player E's team is tilting. But the game is not yet a loss.
Player E's team starts flaming and raging at player E to get him to leave the game so they don't take the LP loss for "his mistakes".
League becomes more toxic.
Those are the 5 I can come up with on the top of my head. I wont same I'm the most crafty guy. I'm sure someone out there can find far worse cases of this system.
Wanting justice is one thing. But adding systems that only bring more problems to replace the old ones are not solutions. Even more so if they put people at risk when real life gets in the way.