That's just the amount of injuries at this current time, the red scouse gits have had plenty of injuries but we've had more throughout the season. And they're ahead, yes, but we've got two games in hand. You've also got to remember the amount of games we've had to play too (which also factors into the injury situation).
This season Chelsea have been VERY lucky with injuries, last season it was Leicester, the season before that it was Chelsea again, then Citeh then United. The amount of injuries that a club has is instrumental in whether a club wins the Premiership. Always has been, always will be.
And yes, I'm happy with winning those trophies because I know that ANY other club with the injuries we've had during these last 3 seasons wouldn't have won a thing. Hell, they would probably end up being mid table too.