How many of these are on-going jobs vs during construction and as-needed? I think you're right it'll be only security guard jobs. Even if they don't travel in workers, it's quick short-term tasks that maybe locals can perform, but that's not "creating jobs."
This argument has always been such a weird goalpost shift for me. Even at my full time job I am getting strung together by 3-12 month projects. Everyone works on projects. When this data center is done in a year, we'll (hopefully) need to build something else, keeping those people employed.
Like, of course it's creating a job. If you create a million 1-year jobs every year, that's a million jobs.