Reply to DJs using sound engineers

Obviously it's something that has gone on for a while, maybe more so recently as the electronic music world expands.

What are people's thoughts on a DJ using a sound engineer? Is it right for a DJ to have tracks written for him? Or for a DJ never even to look at a DAW and have all his tracks produced, such as ghost writing?

Is it ok for a DJ to seek help when writing?

I know a few that I could name drop, but not sure that would be morally right, so let's just keep it to your thoughts on the subject.

Discuss.