Ron Stone started one game for the Cowboys, due to injury, before moving on to a ten year career as a starter for the Giants, 49ers, and and three Pro Bowl selections. He wasn't going to replace Nate Newton or Larry Allen.
Kevin Gogan lost the starting LG job to Nate Newton, switched to RG and was eventually replaced by Larry Allen. Gogan then went on to continue a 14 year career playing for the Raiders, 49ers, and Dolphins. Along the way he made three Pro Bowls.
Kevin Gogan started one Super bowl season when John Gesek was hurt. Gogan and Stone did not leave the Cowboys due to cap hits. They left because there was no room for them in the starting lineup.and they wanted to start.
It is a true statement unless you want to argue that Gogan and/or Stone should have been starters over Nate Newton and Larry Allen but would have been too expensive...good luck with that.