Is SFL-TAP and or the CSP program a reward to some? Or a requirement to ALL?

So I am 6 months out from ETS, ready to get out and start the next chapter of my life. I joined the army with a GED so I’m slightly more limited on options when I get out. I got put on gate guard about a month ago because I’m getting in soon. I watched a few buddy’s get out and attend the CSP program and are doing quite well because of it. I asked my leadership about it bringing up the fact that I’m running out of time and I’d they told me if I want to do that I need to reenlist for a year or two because they need me on gate guard. While at the same time stuff doing multiple things at the company even though I was under the impression that you can only have one place of duty, but I guess that’s a whole different post. The point is I would like to try to start planning and setting my self up for success outside of the army (a little bit under 6 months) My leadership is telling me that’s not going to happen. Is there any kind of regulation on this? Or do you have any advice for how I should go about this?