There's is only one answer: Because they don't care.
The reasons for it are many: decline in the interest in church, aggressive push of pop culture, information overload, shortening attention span etc.
Is there anything YOU could do to help this situation?
Actually there is: Help them care more about the organ and its art.
That's it. That's all there is to it.
No shouting from the rooftops, no spending of big bucks on TV ads, no manipulating people.
Just give them a simple reason of why they should trust you.
Practice I-VI-IV-V-I in F major (see example)