Avos U'Banim time changes get the approval of the Gedolei Hador

Avos U'Banim is a big deal on Purim with special prizes etc. This year with Purim being on Friday it is difficult to find time for the hour of Avos U'Banim. Therefore a number of shuls decided to have Avos U'Banim on Taanis Esther between Mincha and Maariv.

One of the shuls put up a sign which stated that Avos Ubanim is Thursday between Mincha and Maariv and then at the bottom it stated the following:

This sign was shown to R' Chaim Kanievsky and he said Bracha V'Hatzlacha

In other words something as trivial as changing Avos U'Banim to Taanis Esther now needs the haskama of the Gedolei Hador. The shul in question has a Rabbi who is a big Talimd Chacham yet they felt the need to say that they had the approval of R' Chaim Kanievsky. What have we come to? Can no one other then the "Gedolei Hador" have an opinion anymore? Do we really need to bother someone like R' Chaim Kanievsky about what time we should make Avos Ubanim on Purim?

Rafi G has another example of this phenomenon. The Kupa shel tzdeka in RBS felt the need to go to put out the following flyer:



Again, this is a basic halacha of עניי עירך קודמים. Why do we need to hear this in the name of the "Gedolim"? Why wouldn't people ask their local Rav what to do?