It's highly unlikely that anyone, regardless of what type he/she is would prevent himself from saving and protecting life, regardless of whether he loves them or only knows them.True. The fact he loves her and wants to keep her out of harm's way alone doesn't prove Fe. It's the fact he wants to save everyone else as well that does, a higher Fi user in that situation would likely think of himself and those close to him, exclusively.
And I am sure ISFPs would be just as much as heroic as ESTPs would if they have to. Wouldn't look so macho though .