100%. Or from a practical perspective at least have a classified top off. I actually found USAF C&S not completely worthless (looking at you EWS) even with unclass limitations, but the discussion posts quickly got a little too close to SCIF chicken than they probably should be (another reason there should be a classified option).
On another practical level, TS is probably a bridge too far for broad stroke PME. A very large amount of Os don’t rate one.
ACSC- "plan an unclass operation to kick China out of the SCS"
Me- "uh... Eliminate A2AD threats, establish air dominance, send in the surface ships and Marines to take islands and establish and defend Maritime lines of effort that enable freedom of navigation to support logistics while also having lines of operations against the CCP- and hope Taiwan, Japan and Korea can hold their own while we get our shit together."
ACSC- "You didn't use specifics, but the medical officer said that they would convince China to back off with a strongly worded email and non kinetic actions."
Me- "well, this is unclass so I get to use fairy dust and moon beams."
The amount of Officers who have to take ACSC but don't need it is mind boggling. And you're right, most of them don't need a security clearance.