That has advantage of delaying or staying a trial on the merits of validity and infringement--such a trial is invariably longer in time, more costly, and involves most likely participation by a jury.
This is (IMO) exactly why Teva moved for a summary judgment on inequitable conduct. Teva did not expect to prevail on the motion for summary judgment, but rather wanted to get a separate mini-trial on inequitable conduct to delay the ultimate resolution of the patent case as much as possible.
“The efficient-market hypothesis may be the foremost piece of B.S. ever promulgated in any area of human knowledge!”