Having just gone through this at Southern California Edison I can say with certainty, your the omnipotent voice that thinks it means something. Your opinion means exactly squat.
If you had a job that paid enough to actually count here, you would indeed be training your replacement. Why? Because they put little lines in your separation agreement that give you money for completing your new obligation. Enough money to hopefully get you by until the next job. Yep, it sucks anyway you look at it, but you really have no choice other than to go along with them unless you get a firm offer quickly, which happens a lot, but in the $100-$150k bracket, jobs usually take time to acquire. That's where the speration agreement dollars help out. It gets you through for say 5 months and a bonus at the end. If you plan well, that's enough to get by for a year.