I think we're all looking at this the wrong way. Since almost none of this situation makes any hockey sense, it's probably fair to assume it's not a hockey decision.
I don't think we can ignore that Vadim's family just moved across the globe to a city that speaks a language none of his family is fluent in. They've got no friends here outside of the Vegas Golden Knights. They're alone. That is a huge move, one that very few people would be comfortable with right away. Pretty brutal.
Then, right after they get here, the largest mass shooting in US history happens. I don't know how long they were here prior to camp, but let's say they got here on the 1st of September. A month after you arrive in a foreign land and start to pick your home in this strange city, that happens. 10 people on the team were locked down at the Cosmo for while after they ate dinner as a result of the shooting.
There are people that have lived in Las Vegas their entire lives, people that speak the language, people that know the cops, people that can drive around and not get lost, etc. that were freaked out by what happened and kept their kids out of school. The largest shooting in American history happened a block from T-Mobile Arena two hours after Vadim's new team lost to the Sharks. His wife speaks no English, is likely not super comfortable in a new place and that happens. If she thought she needed to call 9-1-1, would she be able to communicate with the person on the other line? Would you be comfortable if you couldn't?
I don't know if any of this has an impact on anything, but I think it deserves a little thought.