I think that this is just a prudent sell recommendation.
Claim tax loss now, wait the appropriate time period and then buy back when others are doing their tax loss selling.
Could make a few extra percent and take back some capital gains on other investments at the same time.
It is what I have done in the past and am considering here this year.
I am not worried about the waiting period going into the new year, as I don't see SGR taking off so quickly.