I'd rather go to a Grade 1 Chase without a run, than on the back of a fall. Much as I love Cue Card, his recent efforts can't be ignored (two falls in last three outings), and age withers them all eventually.
I know a few on here like BdM, but his limitations have been exposed, imo. I hear all the talk about him only being a 6yo, but he has had 15 chase starts, so he is not an inexperienced campaigner. Is he capable of further improvement, given he is somewhat of an open-book already? I personally don't see it. He certainly didn't improve in beating the 152-rated Blaklion by 1/2L, conceding 6lbs, and won't necessarily improve for the run, given he has always run with credit FTO (defeats due to inadequate trips rather than fitness disadvantage).
Any way I look at it, odds-against SJ is fair enough.