Human beings are able to work out the ambiguity because a lot of meaning is carried in shared context, which in turn arises out of cultural grounding. That achieves disambiguation, but only in a limited sense. If humans could perfectly disambiguate, you wouldn't have people having disputes among otherwise loving spouses and friends, arising out of merely misunderstanding what the other person said.

Programming languages are written to eliminate that ambiguity because you don't want your bank server to make a payment because it misinterpreted ambiguous language in the same way that you might misinterpret your spouse's remarks.

Can that ambiguity be resolved with more English words? Maybe. But that would require humans to be perfect communicators, which is not that easy because again, if it were possible, humans would have learnt to first communicate perfectly with the people closest to them.