Don't you wonder why Kubel was made a capping vehicle instead of the same failed mobile suppression platform?
Don't you?
Super mobile HMG that can not be suppressed and is backed by strongest CQC unit in early game that can also keep that HMG indefinitely in combat, helping to easily cut off opponent from resources until they get actual AT or more expensive and later coming light vehicle.
If you want to swing "history" card, please make sure you actually are aware of how the history went.
Halftracks are only good for transporting, shielding and reinforcing infantry and their duties end there. The only saving grace is upgrades.
So once again I don't see a point in a lightly armored unit that needs to lockdown in order to suppress. It's better off just reinforcing infantry and being a "Panzerschreck bus" albeit with a single squad inside.
If you don't see benefit of a unit and don't deem it worth getting, then don't get it.
It'll have a role in capturing and holding cut-offs in early game.
There are couple of halftrucks in game which provide suppression and fire support for low-ish cost and have to be immobile for full benefit.
This one needs to be locked down for its suppression, because its the only one in game which happens to be able to transport infantry as well, so a tradeoff needed to be there to keep it in check.