There's no scrutiny to be had, players and teams have full discretion when it comes to when to get surgery, and once they have surgery they won't be cleared to play and this be eligible for LTIR.
You clearly already decided why the timing is what it is, you've got the conspiracy locked in and anything else is implausible to you so what's the point? In the end, it doesn't really matter, Murray was never part of the debate as to whether the leafs have been lucky with injuries, he's just a guy you brought into the conversation to try and distract from the main point.
As for Klingberg, perhaps they are trying to time it to have him available for the playoffs, or with the holiday season, elective surgeries are a bit harder to schedule, in the end it doesn't matter because it's all irrelevant to the main point, 50 dman games lost in 24 games is not lucky wrt injuries.