Why reconnect and play if I still get punished either way?

Computer restarted on me, when I came back my team did not opt to remake. At the time I thought "yay I can avoid a penalty". Game ended at 25 minute mark with my team winning.

As a result I still get slapped with -20 lp and low priority queue.

Whats the point of reconnecting and playing if i get punished either way? I was hoping to at least have some kind of reduction in penalty by playing but not full punishment like this