Well, yeah because the reversal is just completely wrong most of the time.
Only if you have additional context clues like definite articles or some outside knowledge that a role or property is unique, then you can maybe, sometimes conclude the reverse. Not a bug, working as intended.
Keywords "some" and "quite". Also, only (likely) half the information. "John is Alice's parent.", "Who are Alice's parents?".
And that is ignoring questions like single parent households, adoptions, biological parents, step parents, multigeneration households, getting disowned...
If a reversal is correct 90% of the time, that is useful. However, it will still be wrong 10% of the time.
Only if you have additional context clues like definite articles or some outside knowledge that a role or property is unique, then you can maybe, sometimes conclude the reverse. Not a bug, working as intended.