-Or can it be said to be their style.

For example:

1. Is there anyone to expect, that in social tasks he seeks to complete, he requires spirituality?

2. Procure for yourselves an implement for writing.

No, 'stilted' doesn't mean the writer is dumb (if you are referring to joy's response). Look the word up in the on line dictionary if you are unsure of what it means. Or let me do it for you:

stilt·ed/ˈstiltid/
Adjective:

(of a manner of talking or writing) Stiff and self-conscious or unnatural: "we made stilted conversation".

Exampe one is okay, however, 'procure' in the second is a useless word for the meaning it intends, if I am reading it correctly, are you saying 'get a pencil', or are you saying 'learn how to write'?

It's also an indication of large chucks of Copy and Paste work when writing an essay.
Basically the author doesn't understand how all of the copied phrases link together and so the tone, flow and style of the piece is disjointed.