لِمُجَرَّدِ الِاهْتِمَامِ لَا لِلتَّخْصِيصِ
For mere special attention, not for exclusive restriction.
Fronting does not invariably entail exclusive restriction. It may also be used to foreground a participant, attract attention, or maintain topical coherence.
Therefore one response to unusual hal constructions is to read the fronting as attention rather than exclusivity. But that does not by itself resolve every objection: word order, context, and intended question focus must be considered together.