Yes.
They heal wounded units.
Because a medic squad already existed since release for UKF.
Because that solution is readily available for the faction with minimum effort and doesn't require adapting other factions solution.
(Are you arguing for anything other reasons than to disagree with me?)
IS heals wounded units FA, heals wounded and base medics would also heal wounded units if the become available. Making medical squad available stock to UKF serve no purpose already covered by other solution.
Yes they existed as doctrinal unit but that does not creates the need for "new" solution when it comes to healing for UKF.
The "solution" has already been patched severally times in attempt to "fix" it, despite base medic being an already tested solution.