Defending cut offs is also a main feature of CoH2.
Also what you say applies also to caches, booby traps, satchels & mg bunkers.
Now what is setting one more back: Losing a cache or the T4 building? So you can conclude, high risk - high reward.
Caches and bunkers can be killed with Captain alone, Schwerer is taken down by combined arms. You basically have to commit almost all your forces for this task, leaving you vulnerable with map control and flanks.