I am working through a contact to find out about Rabbi Belsky.
Every good poseik has personal chumros he keeps for himself but does not impose on others. The question if this is one of those chumros or not.
This issue has also become highly politicized, with techeiles being viewed as a mizrachi mitzvah. So it could be, if Rabbi Belsky does this, that his silence is simply so as not to be attacked by the anti-zionists. Thus the need to clarify.