Still, you miss the point. Rack pulls and trap bar deadlifts ARE NOT 80% the same thing. Dips instead of hack squat is essentially the same kind of substitution and trap bar deads for rack pulls, but I guess you missed that point as well.
I blew up? Really?
Jumped to what conclusions...the conclusion that your advice showed an apparent lack of understanding of the two exercises the OP asked about? I'm not the only one that saw that, check BONEZ's first response as well- apples to oranges. He is clearly an experienced and knowledgeable lifter, and said the same thing I did- that you can't compare the two, nor are they substitutes for one another.