The Authors page is a bit lackluster. I generally do not use it for this reason. Though appreciated, I can see that being able to create a more extensive profile by using a post as being a valuable option. You could possibly have a “switch” to enable or disable posts.
In effect, I can see being able to use a post instead of the “description” and a switch to add, or not, posts as you do already. This would be a handy feature. I realize that I could modify this behavior myself, however, many users may not.
Imagine you are a lawyer. One quick look at attorney profiles on the net would show that a detailed profile is required. This is true for programmers, academics, real-estate professionals, politicians (ugh), activists (double ugh), etc.
This seems like it would be a simple change though templates would likely require updating also. Again simple.