Yes, someone could lead you to another airfield; they can't land the aircraft for you.
If they cant land the aircraft then they shouldn't be up there solo in the first place.
my log book showed that I practiced PFL's and EFATO's in the lessons leading up to my solo and I would think this is common practice.
my point is that if the runway is blocked you have the ability/skill to keep airborne until the problem is solved and if you lose the engine, you have been taught to do a PFL and your instructor should be confident of your ability to land. If you need to damage the aerie to walk away then that is what you do.
Sky