Because they won't get to be in charge of it.
Maybe the American people need to see the process and understand that they may finally have a person to vote for who is truely a representative of the Republican people and not just the Party.
Mel
In the article you posted, Ron Reale makes the point that the pundits and Dick Morris have been trying desperately to cover up. The party rank and file do want to have a real convention.
The scam that Morris, the pundits and the GOP-e are selling, is that the Republican Party primary voters are somehow disenfranchised by no single candidate having the nomination locked up pre-convention! That idea is nuts! They think we are idiots!
The system is imperfect and the compromises an imperfect system extracts from those who practice its arts are inevitable. We like to blame the politicians but the fact of the matter that Romney used negative ads against Gingrich knowing they would work and work they did.
Democracy is about people choosing their fate and there is no guarantee that they will choose wisely. In fact the genius of democracy is not in avoiding mistakes but in correcting mistakes they made in the last election before they bring the country to ruin. In other words, democracy is a messy and often unfair system of government. It is full of flaws, corruption, waste, and simple stupidity.
So the process of electing officeholders reflects the weakness of the people who permit themselves to be exploited by tricks such as negative ads. In the course of our affairs sometimes we must stand on principle and sometimes we must compromise. I am among the very earliest of Gingrich supporters on these threads and I am far from willing now to surrender to the likes of Mitt Romney. But there will come a time
