There is no real reason why not. We frequently do this. Sure, you have to find someone who can read and understand the material and knows what good academic wri

There is no real reason why not. We frequently do this. Sure, you have to find someone who can read and understand the material and knows what good academic writing looks like, but professional copywriters are usually up to the task. However, you iterate a lot on drafts so it usually happens only at a few stages, certainly not before uploading something to a preprint repository. In addition, there's a cultural or institutional blindness. Many are bad writers, but are also blissfully unaware of the issue. Without my advisor, who is an excellent writer and yet hires professional proofreaders, I think I simply would not have known that it is something you can or should do.