Because the new convention will lose the 1st, 2nd, and 4th Amendment at the least. We have already virtually lost the 9th and 10th years ago. You will never get the kinds of numbers needed to pass anything of consequence. You won't like the result. Why not convene some sort of tribunal to impeach a majority of the creeps that refuse to follow what is written now? We need a purge of about half the judges and 3/4 of the legislators.
Does anyone believe we will ever get rid of Harry Reid, or Pelosi? San Fran loves her.
The only ways I know of of doing these things involves blood. Having a large argument for years won't fix a thing, IMO.