Bob, I see where you are comming from. And your thoughts are valid.
You are right, it is not "difficult" to input the chords as it stands.
But it could be greatly improved. Particulary chord builder. It just sucks how slow and not intuitive it is. I do my backing tracks mostly by ear, so for me, that is probably much more important than to you.

I believe the culprit of misunderstanding is that you are expressing your point of view basing on workflow that you are familiar and comfortable with, not taking in the account that there are many other interesting (and some would argue better) approaches in the wild.

P.S. If I will have some spare time I will make a sketch sometime in next few weeks and post it to wishlist of a chord builder that I think would be a better choice than current.