Not the point. Latas would have had a greater impact on the TT team than R10 can on the Brazil team at present.
How much impact he had in the Paraguay game?
This argument is nearly 4 years old and I suppose will continue. If you accept that Beenhakker was spot on in his decisions leading up to qualification, then you will have to do the same for the actual WC.
The major factor affecting Latas playing time in the WC was Avery John Red card vs Sweden
As for Brazil? Dunga seems to be doing ok without Ronaldinho. As a fan 100% I want to see him play (just like I wanted to see Latas) but the coach will make his decisions based on the info he has and his plans for the cup.
Besides all that, how much goals Milan score in that Roma game?