WWWeeeelllll, for me it's like this, I get attached to my men and units. It is not something I would do lightly. Not to say I wouldn't and have.
Your situation as put forth, sounds like one of those situations.
If it means saving the objective and helping those squads stave off the enemies push then I'd say yes. If the enemy is going to take it and you wouldn't get it back then I'd say not.
Beyond that..........
In real life that would be the units’ call, probably would depend who the enemy was. I think if the IJA or the Interhamwe was about to overrun my position steel rain might be preferable to capture!!
IMHO Bob out
