The pragmatic problem would be that the length of quarantine necessary could be 10 days with part at home - right? That's basically a whole round. So he leaves his family to rejoin the team and there's a decent chance that it's all for nil. Or it could be that whatever the family problem is could reemerge, and again, it's a useless gesture. The quarantine length could be long if - for example - Rask went to a hospital. I remember a player a week or two ago who had a kid went back home but didn't go to the hospital to reduce quarantine time. I think the kid came home to meet "dad".
Also, it was said earlier in this thread that they can do families in Edmonton for the ECF and SCF - the NHL may backing away from that.
Protocols in place for families to join NHL bubble
I saw another article today that was a little more pessimistic but I can't find it. It's not a 100% sure thing and it wouldn't be easy for the family to join the bubble.