I asked the same query to
@Oldhand few days back, he replied like this
"Nope, it doesn't work that way.
The 'two per NOC (National Olympic Committee)' is only when more than one player (or pair) is ranked in the top echelon.
The top echelon comprises 16 ranks for singles and 8 ranks for doubles.
The BWF rank (the yardstick here) stays the same even if someone in the top echelon is ineligible by nationality rules.
(However, a spot does open up if a player is removed from contention by his or her NOC - as in the case of Kento Momota.)"