You have to look at it like all facilities are 100% staffed and say that's 15,000 controllers. If you contract out facilities that staff 2,000 controllers and move those controllers to other facilities, now you are overstaffed by 2,000 controllers. Through retirements and other losses you would get down to 13,000 controllers eventually which would be the 100% staffing number. So you lost 2,000 jobs.
If you want to say that they went contract and they weren't actually "lost", that should never be something a union should advocate. You just took a massive amount of jobs and decimated the earning potential and benefits of those jobs. Not to mention, like others said, the contractors would not staff the facilities anywhere close to where the FAA will...so less jobs
You're looking at it from not losing any current controllers jobs only due to where our staffing is currently, which isn't what people are talking about