These two people accept that the GB are just imperfect men and that they will get it wrong every now and then. But they trust them to try hard enough.
That just doesn't stand up though...they are imperfect men but when they come together as the GB and IF the Holy Spirit is involved then being imperfect means nothing...they will always be right IF Holy Spirit is involved.
If they get it wrong from time to time as your example states then Holy Spirit is NOT involved and how can anyone trust anything they say? Getting it nearly right means diddly squat if a life-saving decision is involved.
Someone dies because they never took blood but hey...the GB "nearly" go it right...doesn't make an iota of a difference to the dead person!
The whole thing is flawed.