Thank you for your question!
In my experience, I haven’t been in a Western country when that practice takes place. However, in India when I visited a center in Jodphur, I recall such practice somehow.
Traditions and ways of doing things will change among centers in the world and among centers on the same country even. Depends on the person in charge.
Some souls may feel that by doing that practice they are giving respect to Brahma Baba or BapDada as to follow a tradition.
If I am in a BK center where that is required, I will follow that practice out of respect for that center.
However, that is where spirituality separates from religious rituals in my view. That religious ritual is not needed for self realization, but at the same time; to acknowledge someone else’s beliefs; is to show care and love which is part of that self realization.