I think both sides of the quilt are true. ")
In the case of Kathleen Riggs, she must be famous for her quilting and people want to say " this was quilted by Kathleen Riggs", therefore no consultation.
In your case with this particular customer, she almost said the same thing, chose you over others whom she had access to, likes what you do, wanted something special with out knowing what she wanted. I think that was giving you the creative license to do what you do. Waters got muddied when you tried to get her input on the quilt.
The other side is some people have a very definately idea of what they want, either dictated by end use of the quilt, or budget.
So, I guess you do need to rethink, some know what stiches they want and some want you.
What a great compliment to your skills!