(crass generalization) non technical people tend to see the "idea" they have isolated out of the sea of possibilities as the important thing.
Now that this important idea has been identified I just need someone to stuff some "supports" under it and we are done!
top down
From the other direction, great ideas are a dime a dozen. Enormous amounts of (outwardly invisible) time have been spent exploring the landscape these "supports" would need to sit on the down to the bedrock. There may be things that are just to obvious to consider explaining why that particular idea is not worth the effort. Maybe it is boring or sub optimal or infeasible, or just dumb.
A hacker (what ever that means anymore) would be more apt to consider what they had on hand and where they were and most importantly, how they could inject some cleverness into the building of their supports, then climb up and see where they had gotten themselves.
bottom up
All obvious gross simplifications for illustration purposes.
If you are endeavouring to address a disconnect, first of all kudos to you for making the effort.
Two paths that could help are
Better illustrator of "the idea". The everyday marketing of the idea to the masses is not going to help here. You would need to demonstrate the value added that would make what ever reluctance there is be set aside.
The other is experience what is causing the reluctance; get some blisters yourself.