I just realized I used the word calling in my original post "Edmunds future calling". I was using the word interchangeably with the word profession, which I think is OK since the dictionary says an employment, trade. Calling is listed as a definition of profession as well.

But I will elaborate.
I do think it is evident in Ch. 9 that Edmund will be a good clergyman. Even though it was a profession ready made, he's entering it with the right feelings.
We must all feel at times the difficulty of fixing our thoughts as we could wish;...“The mind which does not struggle against itself under one circumstance, would find objects to distract it in the other, I believe; and the influence of the place and of example may often rouse better feelings than are begun with.

and outside at Sotherton
No one here can call the office nothing. If the man who holds it is so, it is by the neglect of his duty, by foregoing its just importance, and stepping out of his place to appear what he ought not to appear.”...
The manners I speak of might rather be called conduct, perhaps, the result of good principles; the effect, in short, of those doctrines which it is their duty to teach and recommend;

I do think Edmund would be serious about any profession because he has good principles. But he does have a profession ready made, and is comfortable with living that life.

I guess he's blind because he thinks she's joking.
“Your lively mind can hardly be serious even on serious subjects.
She may think it's just as easy for him to change profession and does not think highly of clergy.
He's blind to how far apart they are in their ideas, and it becomes more and more apparent each time she attacks him on it.(because she's not done yet) : )